Web ID resources

The internet has revolutionised natural history.  More literature - keys, photo galleries, discussion threads - is more widely available now than at any previous point, and more and more experts are easily contactable to check what you've found. However, these resources are scattered far and wise across the web, buried in distant sites even Google barely knows, and often the hardest thing can be finding a reliable starting place. 

I'm a biologist by trade, a naturalist by inclination, and since I first found the internet I've been collecting links on how to identify British wildlife.  Chatting to a few friends has finally persuaded me to put the links somewhere useful!  The links are grouped by family, sorted alphabetically by Class and then by Order, and are just sites I've found useful, mainly keys and galleries.  I'm sure they're not comprehensive, but they're a start! If you know of more, please do email me on richardcomont at gmail.com & I'll add them.

Several of the sites aren't in English - I tend to open these sites using Google Chrome, which has an inbuilt translation facility which seems to work fairly well, and which will pop up automatically when the site loads

The most important thing you can do with your sighting is to record it, and turn your sighting into a biological record.  These records build into data, which can be used in myriad different ways - scientifically, to indicate the general health of the countryside, to determine the effects of an invasive species on native populations, or just to prove that this particular field is a wildlife haven that shouldn't be built on.  None of it is possible unless you write down your findings! 

Recording:

Cross-taxa online recording (many of the taxonomical schemes below also welcome records) - http://www.brc.ac.uk/iRecord/

Explore species distributions with the National Biodiversity Network (NBN) Atlas - https://nbnatlas.org/

Biological recording news, tools and resources from the NBN - www.nbn.org.uk

Find your vice-county from a grid ref - http://herbariaunited.org/gridrefVC/

Find your grid ref with side-by-side map & aerial photo - http://wtp2.appspot.com/wheresthepath.htm

Find grid refs/vice-county with side-by-side map & aerial photo - http://www.bnhs.co.uk/focuson/grabagridref/html/index.htm

Grid ref converter (includes batch converter) - http://gps.ordnancesurvey.co.uk/etrs89geo_natgrid.asp

Identifying:

Useful crosstaxa ID sites:

Excellent photo ID site (anything vaguely wildlifey!) - http://www.ispot.org.uk/

Identification keys (multi-access Bayesian keys, designed to be as easy as possible to use) - http://www.ispot.org.uk/webkeys/

Malcolm Storey's online field guide, BioImages - http://www.bioimages.org.uk/

Guide to ID & recording of non-native species in Britain - https://secure.fera.defra.gov.uk/nonnativespecies/factsheet/index.cfm

Delta interactive multi-access keys (very many available, program download necessary) - http://delta-intkey.com/www/data.htm

The British Wildlife Wiki - http://www.britishwildlife.wikia.com/wiki/British_Wildlife_Wiki

Wikispecies - http://species.wikimedia.org/wiki/Main_Page

Various galleries of British wildlife - http://www.amanita-photolibrary.co.uk/page4.html

Field Studies Council downloadable guides - http://www.field-studies-council.org/fieldstudies/category.htm

UK Safari (photo guide) - http://www.uksafari.com/index.htm

Wild About Britain - http://www.wildaboutbritain.co.uk/

Steve Falk's Flickr sets - http://www.flickr.com/photos/63075200@N07/collections/

OPAL Explore Nature guides & keys - http://www.opalexplorenature.org/Identification

EakringBirds - many photos, very far from just birds! - http://www.eakringbirds.com/index.htm

Natural Environment Research Council (NERC) Open Research Archive (NORA) - (theoretically) all NERC output, ie ITE, CEH, BRC atlases, etc - http://nora.nerc.ac.uk/

David Fenwick's photo fauna (terrestrial) - http://www.aphotofauna.com/

Cornwall's wildlife - http://www.carolscornwall.com/

Naturespot, the wildlife of Leicestershire & Rutland (applicable way beyond) - http://www.naturespot.org.uk/content/species-library

Search for factsheets on non-native species - https://secure.fera.defra.gov.uk/nonnativespecies/factsheet/index.cfm

Highland Biological Recording Group - http://www.hbrg.org.uk/index.html?

Canadian journal of arthropod identification (mainly Canadian species) - http://www.biology.ualberta.ca/bsc/ejournal/ejournal.html

Online-keys site, user-submitted - http://www.online-keys.net/infusions/keys/keys_view.php

Zookeys journal - http://www.pensoft.net/journals/zookeys/

Biodiversity Heritage Library's Flickr sets - http://www.flickr.com/photos/biodivlibrary/sets/

3I system of various interactive keys - http://imperialis.inhs.illinois.edu/dmitriev/index.asp

Cross-taxa, by habitat:

Freshwater invertebrates:

OPAL key to freshwater invertebrates - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/aquaticmini.0.5

OPAL guide to freshwater invertebrate groups - http://www.opalexplorenature.org/sites/default/files/7/file/Water-survey-fold-out-chart-WEB-EDIT.pdf

Riverfly Recording Scheme (Ephemoptera, Plecoptera & Trichoptera) (Mayflies, stoneflies & caddis-flies) - http://www.brc.ac.uk/schemes/RRS/homepage.htm

FreshwaterLife ID guides - http://new.freshwaterlife.org/identification

Field key to the invertebrates of stony hill streams - http://www.field-studies-council.org/fieldstudies/documents/vol4.2_99.pdf

Interactive key to families of European limnofauna (superset of the British fauna but still useful!) - http://wbd.etibioinformatics.nl/bis/limno.php?menuentry=sleutel

FBA key to the aquatic Oligochaeta - http://www.fba.org.uk/sites/default/files/A%20Guide%20for%20the%20Identification%20of%20British%20Aquatic%20Oligochaeta.pdf

Guide to invasive freshwatershrimps & isopods - http://www.fba.org.uk/sites/default/files/InvasiveFWShrimps&Isopods_Dec2012.pdf

Key to the larvae (families) of British mayflies - http://www.fba.org.uk/recorders/publications_resources/keys/mayfly/contentParagraph/03/document/MayflyKey_Comp.pdf

Separating Crangonyx, Gammarus & Niphargus - http://www.fba.org.uk/recorders/publications_resources/keys/shrimp/contentParagraph/03/document/SimpleKeyToSelectGAMMARIDEA.pdf

Freshwater life - http://www.microscopy-uk.org.uk/index.html?http://www.microscopy-uk.org.uk/pond/index.html

Digital key to the aquatic insects of North Dakota - http://www.waterbugkey.vcsu.edu/index.htm

Freshwater animals of the Netherlands - http://www.microcosmos.nl/maingal.htm

Marine life:

Encyclopedia of marine life: http://www.habitas.org.uk/marinelife/index.html

Marine Life Information Network gallery - http://www.marlin.ac.uk/gallerycategory.php?gcatid=8

David Fenwick's photo guide to marine & rocky shore life - http://www.aphotomarine.com/

Guide to some common seaweeds - http://www.opalexplorenature.org/sites/default/files/7/file/Seaweed-Search-Guide.pdf

Marine species identification portal - http://species-identification.org/

Cave life:

Guide to cave life in Britain - http://www.fba.org.uk/recorders/publications_resources/cavelife/contentParagraph/00/document/CaveLife_Website.pdf

By group:

Arthropods (insects, crustaceans, arachnids, centipedes, millipedes, etc)

OPAL key to common minibeasts - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/minibeast.0.17

Guide to the Arthropod orders (insects, crustaceans, arachnids, centipedes, millipedes) - http://www.amentsoc.org/insects/what-bug-is-this/arthropods.html

Jeremy Early's photo gallery - http://www.natureconservationimaging.com/Pages/nature_conservation_imaging_pictureindex_invertebrates.htm

Photo guide to invertebrates of Britain - http://www.amanita-photolibrary.co.uk/photo_library/BI_invertebrates/index.htm

FSC Invertebrate Challenge site, with resources - http://www.invertebrate-challenge.org.uk/newsletters-and-resources.aspx

Insecta (insects):

Entomology glossary of useful terms - http://www.amentsoc.org/insects/glossary/

OPAL 'Bugs Count' survey of some common insects - http://www.opalexplorenature.org/bugscount

Guide to (& survey for) some common pollinator species - http://www.buglife.org.uk/getinvolved/surveys/Pollinator+Survey/

Database of insects and their foodplants (look up what eats what) - http://www.brc.ac.uk/DBIF/homepage.aspx

Royal Entomological Society downloadable handbooks - http://www.royensoc.co.uk/content/out-print-handbooks

Steve Falk's insect sets on Flickr - http://www.flickr.com/photos/63075200@N07/collections/72157629222209764/

Mike Hackston's insect keys - https://sites.google.com/site/mikesinsectkeys/Home

Key to the orders of insects - http://www.amentsoc.org/insects/what-bug-is-this/adult-key.html

Coleoptera (beetles):

Beetle News: free, online journal for sightings & keys - http://www.amentsoc.org/publications/beetle-news/

Beetle News 4.2 - Guide to beetles on Mallow - http://www.amentsoc.org/publications/beetle-news/2012/beetle-news-vol-04-no-02-2012-october.pdf

Atlas of the beetles of Warwickshire (62mb zip file) - http://www.amentsoc.org/publications/beetle-news/2011/beetles-of-warwickshire.zip

Photos of a decent proportion of the British beetles, including notes on ID features (particularly for difficult species pairs) - www.thewcg.org.uk

Mark Telfer's beetle site - a wide range of keys, guides, test keys, and much more - www.markgtelfer.co.uk

Online archive containing Fowler's 'The Coleoptera of the British Isles' to download - http://www.archive.org/index.php

Online archive containing several volumes of the 'Faune de France' series for download - http://www.faunedefrance.org/BibliothequeVirtuelleNumerique

Online archive containing Reitter's 'Die Käfer des Deutschen Reiches' (1908) for download - http://www.biolib.de/

The Coleopterist magazine - photo gallery, county-by-county rare beetle finder, and the British checklist - http://www.coleopterist.org.uk/

Somewhat random beetle photo guide - http://beetles.source.at/english/system.htm

Photo gallery of the beetles of Germany (in English) - http://www.kerbtier.de/enindex.html

Another photo gallery of German beetles - http://www.koleopterologie.de

Gallery of the beetles of Ireland - http://www.habitas.org.uk/invertebrateireland/image.asp?Checklist=1

Steve Falk's beetle flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629587478333/

Mark Telfer's guide to beetle families - http://markgtelfer.co.uk/beetles/beetle-families-an-overview/

Richard Comont's beetle flickr set - http://www.flickr.com/photos/rcomont/sets/72157626283906073/

Beetles of Britain website - http://www.coleoptera.org.uk/

Die Kafer Europas (in German) - http://www.coleo-net.de/coleo/index.htm

Beetle morphology page - http://www.kerbtier.de/Pages/Themenseiten/enKoerperbau.html

Beetles of Russia - http://www.zin.ru/animalia/Coleoptera/eng/index.htm

Naturespot beetle gallery - http://www.naturespot.org.uk/taxonomy/term/19338

RES out-of-print handbook on Coleoptera, Introduction and keys to families - http://www.royensoc.co.uk/sites/default/files/Vol04_Part01.pdf

Keys to the beetles of Europe (in German) - http://www.coleo-net.de/coleo/html/start.htm

Online key to the beetles of the world - http://keys.lucidcentral.org/keys/v3/botw/

Water beetles:

OPAL key to waterbeetle families - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/aquatic_beetles.0.2

Wood-boring beetles:

Wood-borers of the world - http://wbbresource.org/default.asp?action=taxonomic&id=Anobiidae

Wood-boring beetles of the world - http://www.barkbeetles.org/

Aderidae:

Mark Telfer's Aderidae guide - http://markgtelfer.co.uk/beetles/aderidae/

Key to Aderidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/aderidae

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Alleculidae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Anobiidae (furniture beetles):

Beetle News 3.3 - Guide to splitting the woodworm species pair Anobium punctatum/A. inexpectum - http://www.amentsoc.org/publications/beetle-news/2011/beetle-news-vol-03-no-03-2011-october.pdf

Anthicidae:

Key to Anthicidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/anthicidae

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Key & guide to Anthicidae - http://www.benhs.org.uk/site/sites/default/files/articles/KeyToAnthicidae.pdf

Biphyllidae:

Key to both Biphyllidae species - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/biphyllidae

Bruchidae:

Gallery of Bruchidae (in French) - http://claude.schott.free.fr/Bruchidae/Fiches/Bruchlist.html

Buprestidae (jewel beetles):

Oak Jewel Beetle (Agrilus biguttatus) survey - http://sylva.org.uk/treewatch/oakJewel

RES out-of-print handbook on Buprestidae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part01b.pdf

Mark Telfer's Buprestidae (jewel beetles) guides - http://markgtelfer.co.uk/beetles/buprestidae-jewel-beetles/

Key to the British Buprestidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/buprestidae

Byrrhidae (pill beetles):

Mark Telfer's Byrrhidae (pill-beetles) guide & key - http://markgtelfer.co.uk/beetles/byrrhidae-pill-beetles/

Mark Telfer's work-in-progress key to Byrrhidae & Limnichidae - https://docs.google.com/file/d/0BxY4LbM806l5UzdPYy1VcWo0c2c/edit?pli=1

Key to Byrrhidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/byrrhidae

Cantharidae (soldier beetles):

Mark Telfer's Cantharidae (soldier-beetles) guide & keys - http://markgtelfer.co.uk/beetles/cantharidae/

Fitton & Eversham Cantharidae (soldier beetle) key - http://markgtelfer.co.uk/files/2012/04/CantharidaeKeys_v3.pdf

Keys to Cantharidae (genus) & Cantharis (spp) - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/cantharidae

Carabidae (ground beetles):

Ground beetles (Carabidae) of Ireland (key and photo gallery) - http://www.habitas.org.uk/groundbeetles/

RES out-of-print handbook on Carabidae - http://www.royensoc.co.uk/sites/default/files/Vol04_Part02.pdf

Mark Telfer's Carabidae (ground beetles) guides - http://markgtelfer.co.uk/beetles/carabidae-ground-beetles/

John Walter's (and Mark Telfer's) carabid sheets: http://johnwalters.co.uk/publications/guide-to-british-beetles.php#4

Gallery of Palearctic carabids (ground beetles) - http://www.kaefer-der-welt.de/carabidae_palaearktische_region.htm

Gallery of French carabids (ground beetles) - http://claude.schott.free.fr/Carabidae/Carabus/Carabidae-liste-planches.html

WCG key to all the British Notiophilus spp (big-eyed Carabids) - http://www.thewcg.org.uk/keys/Keynotiophilus.asp

WCG key to all the British Elaphrus carabids - http://www.thewcg.org.uk/keys/Keyelaphrus.asp?StepNum=1

Keys to Carabidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/carabidae

Carabidae of Europe - http://www.eurocarabidae.de/eu/

Palearctic carabid photo gallery - http://www.kaefer-der-welt.de/carabidae_palaearktische_region.htm

Cerambycidae (longhorn beetles):

Beetle News 3.1 - Guide to common longhorn beetles (Cerambycidae) - http://www.amentsoc.org/publications/beetle-news/2011/beetle-news-vol-03-no-01-2011-march.pdf

Longhorn beetles (Cerambycidae) of Europe photo gallery - http://www.cerambyx.uochb.cz//index.htm

RES out-of-print handbook on Cerambycidae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part12.pdf

Mark Telfer's Cerambycidae (longhorn beetles) guide - http://markgtelfer.co.uk/beetles/cerambycidae-longhorn-beetles/

Ecology & natural history of Leiopus nebulosus & L. linnei (Cerambycidae) in Poland - http://pte.au.poznan.pl/ppe/PJE_2010/20_Gutowski_i_in.pdf

Separating Leiopus nebulosus & L. linnei (Cerambycidae) - http://molbiol.ru/forums/index.php?act=Attach&type=post&id=67775

Key to Cerambycidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/cerambycidae

Cerylonidae:

Keys to Cerylonidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/cerylonidae

Chrysomelidae:

Keys to Chrysomelinae (genera), Cryptophagidae (spp) & Criocerinae (spp) - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/chrysomelidae

Photo guide to European species of Chrysomelidae - http://www.biol.uni.wroc.pl/cassidae/European%20Chrysomelidae/index.htm

Mark Telfer's Chrysomelidae page - http://markgtelfer.co.uk/beetles/chrysomelidae/

Gallery of Cassida spp, the Tortoise beetles - http://www.flickr.com/photos/dioctria/galleries/72157624522184437/

Chrysomelidae of Europe - http://culex.biol.uni.wroc.pl/cassidae/European%20Chrysomelidae/index.htm

Donacia (Menzies & Cox, BJENHS) - http://www.biodiversitylibrary.org/item/94526#page/419/mode/1up

Ciidae:

Mark Telfer's Ciidae guide & key - http://markgtelfer.co.uk/beetles/ciidae/

Mark Telfer's work-in-progress key to Ciidae - https://docs.google.com/file/d/0BxY4LbM806l5ODYzY2U4OGItNDFiMS00ZmJmLThhOWItZTFkNDliYTVjMmRl/edit?hl=en_US

Key to Ciidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/ciidae

Coccinellidae (ladybirds):

OPAL key to ladybirds - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/ladybirds_with_melanics.1.2

Guide to the ladybirds of Britain (& online recording) - http://www.ladybird-survey.org/

Ladybirds of the Netherlands (mostly in English) - http://stippen.nl/english.php

Key to the ladybirds of Europe (in German) - http://www.coleo-net.de/coleo/texte/coccinellidae.htm

The Coccinellidae (Coleoptera) of America north of Mexico (Gordon, 1985) (scanned & OCR'd, so slightly scrambled) - http://www.discoverlife.org/users/l/Losey,_John/JEL.html

List of photos of ladybirds (Coccinellidae) (Mostly species occurring in North America) - http://www.biodiversity.ubc.ca/entomology_photos/Coleoptera/Coccinellidae/

Ladybirds (Coccinellidae) of Ireland (photo gallery and key) - http://www.habitas.org.uk/ladybirds/

RES out-of-print handbook on Coccinellidae & Sphindidae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part07.pdf

Gilles San Martin's ladybird gallery (adults; Belgium but much overlap) -  http://www.flickr.com/photos/sanmartin/sets/72157600404369181/

Gilles San Martin's ladybird gallery (larvae; Belgium but much overlap) - http://www.flickr.com/photos/sanmartin/sets/72157603566251878/

Gilles San Martin's ladybird behaviour gallery (Belgium but much overlap) - http://www.flickr.com/photos/sanmartin/sets/72157603439342640/

Ladybirds (ladybeetles) of the eastern USA - http://www.easternladybeetles.com/

Gallery of the commoner ladybirds - http://www.eakringbirds.com/eakringbirds2/ladybirds.htm

Richard Comont's adult ladybirds gallery - http://www.flickr.com/photos/rcomont/sets/72157623774877905/

Richard Comont's pupal ladybirds gallery - http://www.flickr.com/photos/rcomont/sets/72157626283897399/

Richard Comont's larval ladybirds gallery - http://www.flickr.com/photos/rcomont/sets/72157626283916673/

Corylophidae:

Mark Telfer's Corylophidae guide (& key to Sericoderus spp) - http://markgtelfer.co.uk/beetles/corylophidae/

Curculionidae (weevils):

Beetle News 4.1 - Guide to broad-nosed weevils (Polydrusus & Phyllobius) in broad-leaved trees - http://www.amentsoc.org/publications/beetle-news/2012/beetle-news-vol-04-no-01-2012-may.pdf

RES out-of-print handbook on Scolytidae and Platypodidae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part15.pdf

Mark Telfer's Curculionoidae (weevils) guide - http://markgtelfer.co.uk/beetles/curculionoidea-weevils/

Mark Telfer's Scolytinae and Platypodinae (bark beetles) guide - http://markgtelfer.co.uk/beetles/bark-beetles/

Dasytidae:

Key to Dasytidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/dasytidae

Dermestidae (hide, larder and carpet beetles):

Mark Telfer's Dermestidae (carpet, hide & larder beetles & allies) guide - http://markgtelfer.co.uk/beetles/dermestidae/

Dermestidae guide (hide, larder & carpet beetles) - http://www.dermestidae.com/

Drilidae:

Mark Telfer's guide to Drilidae (Drilus flavescens) - http://markgtelfer.co.uk/beetles/drilidae-drilus-flavescens/

Dryopidae:

Key to Dryopidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/dryopidae

Dytiscidae:

RES out-of-print handbook on Hydradephaga (Haliplidae, Hygrobiidae, Dytiscidae (inc Noteridae), & Gyrinidae) - http://www.royensoc.co.uk/sites/default/files/Vol04_Part03.pdf

Eucnemidae (click beetles):

Mark Telfer's Elateridae, Eucnemidae, & Throscidae (click beetles) guide & key - http://markgtelfer.co.uk/beetles/elateridae-eucnemidae-and-throscidae/

Elateridae (click beetles):

Beetle News 2.1 - Guide to the species of Agriotes (Elateridae) (some of the click-beetles) - http://www.amentsoc.org/publications/beetle-news/2010/beetle-news-vol-02-no-01-2010-march.pdf

Mark Telfer's Elateridae, Eucnemidae, & Throscidae (click beetles) guide & key - http://markgtelfer.co.uk/beetles/elateridae-eucnemidae-and-throscidae/

Guide & gallery to Elateridae (click-beetles) - http://elateridae.co.uk/

Erotylidae:

Beetle News 3.3 - key to the species of Erotylidae and Tetratomidae (corrected from 3.2) - http://www.amentsoc.org/publications/beetle-news/2011/beetle-news-vol-03-no-03-2011-october.pdf

Mark Telfer's Erotylidae guide - http://markgtelfer.co.uk/beetles/erotylidae/

Key to Erotylidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/erotylidae---key-to-british-genera-and-species

Geotrupidae (dor beetles):

Beetle News 2.2 - Guide to the Dor beetles (Geotrupidae & Bolboceratidae) - http://www.amentsoc.org/publications/beetle-news/2010/beetle-news-vol-02-no-02-2010-december.pdf

Beetle News 3.1 - Guide to the mandibles of the Geotrupidae (addition to 2.2) - http://www.amentsoc.org/publications/beetle-news/2011/beetle-news-vol-03-no-01-2011-march.pdf

RES out-of-print handbook on Scarabaeoidea (Lucanidae, Trogidae, Geotrupidae, Scarabaeidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part11_ed1.pdf

Key to Geotrupidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/geotrupidae

Gyrinidae:

RES out-of-print handbook on Hydradephaga (Haliplidae, Hygrobiidae, Dytiscidae (inc Noteridae), & Gyrinidae) - http://www.royensoc.co.uk/sites/default/files/Vol04_Part03.pdf

Haliplidae:

RES out-of-print handbook on Hydradephaga (Haliplidae, Hygrobiidae, Dytiscidae (inc Noteridae), & Gyrinidae) - http://www.royensoc.co.uk/sites/default/files/Vol04_Part03.pdf

Heteroceridae:

RES out-of-print handbook on Heteroceridae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part02c.pdf

Delta-intkeys Heterocerus key - http://delta-intkey.com/britin/wat/www/hetcerid.htm

Key to Heteroceridae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/heteroceridae

Histeroidea:

RES out-of-print handbook on Histeroidea - http://www.royensoc.co.uk/sites/default/files/Vol04_Part10.pdf

Key to Histeridae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/histeridae

Hygrobiidae:

RES out-of-print handbook on Hydradephaga (Haliplidae, Hygrobiidae, Dytiscidae (inc Noteridae), & Gyrinidae) - http://www.royensoc.co.uk/sites/default/files/Vol04_Part03.pdf

Lagriidae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Lampyridae:

Glow-worms (Lampyris noctiluca (glow-worm) & Phosphaenus hemipterus (lesser glow-worm)) - http://www.glowworms.org.uk/ especially http://www.glowworms.org.uk/ident.html

Mark Telfer's Lampyridae (glow-worms) guide - http://markgtelfer.co.uk/beetles/lampyridae-glow-worms/

Lucanidae (stag beetles):

The Stag Beetles - http://maria.fremlin.de/stagbeetles/photos.html

RES out-of-print handbook on Scarabaeoidea (Lucanidae, Trogidae, Geotrupidae, Scarabaeidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part11_ed1.pdf

Lycidae (net-winged beetle):

Mark Telfer's Lycidae (Net-winged beetles) guide, with Mike Fitton's key - http://markgtelfer.co.uk/beetles/lycidae/

Lymnichidae:

Mark Telfer's work-in-progress key to Byrrhidae & Limnichidae - https://docs.google.com/file/d/0BxY4LbM806l5UzdPYy1VcWo0c2c/edit?pli=1

Melandryidae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Meloidae (oil beetles):

Guide to (& survey for), oil beetles (Meloe species) - http://www.buglife.org.uk/getinvolved/surveys/Oil+Beetle+Hunt/

Mark Telfer's Meloidae (oil-beetles) guide - http://markgtelfer.co.uk/beetles/meloidae-oil-beetles/

Finding oil beetle (Meloidae) triungulins on bees (specifically, Stenoria analis on Colletes hederae (ivy bee) - now in Britain!) - http://zoologie.umh.ac.be/asef/pdf/2007_43_04%5Ccompact%5CVereecken_Mahe_2007_ASEF_43_4_493_496_compact.pdf

John Walters' oil beetle (Meloidae) guide - http://johnwalters.co.uk/research/oil-beetles.php

John Walters' oil beetle (Meloidae) ID tips (includes Meloe mediterraneus) - http://johnwalters.co.uk/research/oil-beetle-identification.php

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Key to Meloidea -  https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/meloidae

Mordellidae (tumbling flower beetles):

Mark Telfer's Mordellidae (tumbling flower-beetles) guide - http://markgtelfer.co.uk/beetles/mordellidae/

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Mycetophagidae:

Key to Mycetophagidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/mycetophagidae

Mycteridae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Nitulidae:

Beetle News 1.4 - Guide to the species of Glischrochilus (Nitidulidae) - http://www.amentsoc.org/publications/beetle-news/2009/beetle-news-vol-01-no-04-2009-december.pdf

Key to Nitulidae genera - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/nitidulidae

Noteridae:

RES out-of-print handbook on Hydradephaga (Haliplidae, Hygrobiidae, Dytiscidae (inc Noteridae), & Gyrinidae) - http://www.royensoc.co.uk/sites/default/files/Vol04_Part03.pdf

Oedemeridae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Phalacridae:

Mark Telfer's Phalacridae guide & key - http://markgtelfer.co.uk/beetles/phalacridae/

RES out-of-print handbook on Phalacridae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part05b.pdf

Mark Telfer's work-in-progress key to Phalacridae - https://docs.google.com/file/d/0BxY4LbM806l5eV9HYThFZHlEZXc/edit

Platypodidae:

RES out-of-print handbook on Scolytidae and Platypodidae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part15.pdf

Mark Telfer's Scolytinae and Platypodinae (bark beetles) guide - http://markgtelfer.co.uk/beetles/bark-beetles/

Pselaphidae:

RES out-of-print handbook on Pselaphidae - http://www.royensoc.co.uk/sites/default/files/Vol04_Part09.pdf

Pyrochroidae (cardinal beetles):

Mark Telfer's Pyrochroidae (cardinal beetles) guide - http://markgtelfer.co.uk/beetles/pyrochroidae/

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Pythidae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Rhipiphoridae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Rhizophagidae:

RES out-of-print handbook on Rhizophagidae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part05a.pdf

Salpingidae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Scarabaeidae (scarab beetles & chafers):

Beetle News 1.2 - Guide to Onthophagus dung beetles (Scarabaeidae) - http://www.amentsoc.org/publications/beetle-news/2009/beetle-news-vol-01-no-02-2009-july.pdf

Guide to the Rose Chafer (Cetonia aurata) life cycle (in French but with many pictures) - http://www.insectes-net.fr/cetoine/cetoi2.htm

Chafer larvae in the garden - http://maria.fremlin.de/stagbeetles/larva-guide/index.html

RES out-of-print handbook on Scarabaeoidea (Lucanidae, Trogidae, Geotrupidae, Scarabaeidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part11_ed1.pdf

RES out-of-print handbook on Dung Beetles & chafers - Coleoptera: Scarabaeoidea - http://www.royensoc.co.uk/sites/default/files/Vol05_Part11.pdf

Dung beetle recording scheme image gallery -  http://www.coleoptera.org.uk/index.php?q=scarabaeoidea%2Fgallery

Scolytidae:

RES out-of-print handbook on Scolytidae and Platypodidae - http://www.royensoc.co.uk/sites/default/files/Vol05_Part15.pdf

Mark Telfer's Scolytinae and Platypodinae (bark beetles) guide - http://markgtelfer.co.uk/beetles/bark-beetles/

Scraptiidae:

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Silphidae (burying beetles):

Beetle News 1.3 - Guide to the Silphidae (burying beetles) - http://www.amentsoc.org/publications/beetle-news/2009/beetle-news-vol-01-no-03-2009-october.pdf

Beetle News 1.1 - Guide to Nicrophorus (burying beetles(Silphidae)) - http://www.amentsoc.org/publications/beetle-news/2009/beetle-news-vol-01-no-01-2009-march.pdf

Keys to Silphidae & Nicrophorus - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/silphidae

Silvanidae:

Key to Silvanidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/silvanidae

Staphylinidae (rove beetles):

RES out-of-print handbook on Staphylinidae, Piestinae to Euaesthetinae - http://www.royensoc.co.uk/sites/default/files/Vol04_Part08a.pdf

Mark Telfer's Staphylinidae (rove beetles) guides - http://markgtelfer.co.uk/beetles/staphylinidae-rove-beetles/

Keys to Staphylinidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/staphylinidae

Tetratomidae:

Beetle News 3.3 - key to the species of Erotylidae and Tetratomidae (corrected from 3.2) - http://www.amentsoc.org/publications/beetle-news/2011/beetle-news-vol-03-no-03-2011-october.pdf

Mark Telfer's Tetratomidae guide - http://markgtelfer.co.uk/beetles/tetratomidae/

RES out-of-print handbook on small families of Coleoptera (Lagriidae, Alleculidae, Tetratomidae, Melandryidae, Salpingidae, Pythidae, Mycteridae, Oedemeridae, Mordellidae, Scraptiidae, Pyrochroidae, Rhipiphoridae, Anthicidae, Aderidae, Meloidae) - http://www.royensoc.co.uk/sites/default/files/Vol05_Part09.pdf

Throscidae (click beetles):

Mark Telfer's Elateridae, Eucnemidae, & Throscidae (click beetles) guide & key - http://markgtelfer.co.uk/beetles/elateridae-eucnemidae-and-throscidae/

Trogidae:

Key to Trogidae - https://sites.google.com/site/mikesinsectkeys/Home/keys-to-coleoptera/trogidae

Dermaptera (earwigs):

Species accounts - http://www.orthoptera.org.uk/species_dermaptera.aspx?userid=0

RES out-of-print handbook on Orthoptera & Dermaptera - http://www.royensoc.co.uk/sites/default/files/Vol01_Part05.pdf

Naturespot earwig gallery -  http://www.naturespot.org.uk/taxonomy/term/19480

Photo-guide to earwigs, cockroaches & stick insects -  http://www.orthoptera.org.uk/recording/sites/default/files/earwigs,%20cockroaches%20and%20stick-insects.pdf

Dictyoptera (cockroaches and mantids):

Species accounts - http://www.orthoptera.org.uk/species_dictyoptera.aspx?userid=0

Photo-guide to earwigs, cockroaches & stick insects -  http://www.orthoptera.org.uk/recording/sites/default/files/earwigs,%20cockroaches%20and%20stick-insects.pdf

Diptera (flies):

Dave Gibb's website (principally Pipunculidae (big-headed flies) & Bombyliidae (bee-flies)) - http://davidjgibbs.webs.com/

Diptera.info's page of links to web-keys (most not for British species, but some overlap) - http://www.diptera.info/weblinks.php?cat_id=7

Gallery of flies at Diptera.info - http://www.diptera.info/photogallery.php

AIDGAP keys to the families of British Diptera (Unwin, 1981) - http://www.field-studies-council.org/fieldstudies/documents/vol5.3_143_A.pdf

Steve Falk's fly flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629586945825/

RES out-of-print handbook on Diptera. Introduction and key to families - http://www.royensoc.co.uk/sites/default/files/Vol09_Part01.pdf

Richard Comont's Diptera flickr set - http://www.flickr.com/photos/rcomont/sets/72157623899325040/

Dipterist's Forum - http://www.dipteristsforum.org.uk/

Mediterranean Diptera - http://www.naturamediterraneo.com/forum/gallery.asp?case=ordine&action=Diptera&genere=Xylomidae

Photogalleries of the Diptera of East Yorkshire - http://www.flickr.com/photos/52163027@N02/collections/72157632416514936/

Anatomical Atlas to flies - http://www.ento.csiro.au/biology/fly/fly.php

Naturespot general fly gallery - http://www.naturespot.org.uk/taxonomy/term/19427

Brachycera:

Clues to families of Brachycera - http://www.entomology.umn.edu/museum/links/coursefiles/Brachycera%20characters.html

Agromyzidae:

RES out-of-print handbook on Agromyzidae - http://www.royensoc.co.uk/sites/default/files/Vol10_Part05g.pdf

Aseiidae:

Key to the Asteiidae of North Western Europe and the West Palaearctic - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=6

 

Asilidae (robber-flies):

A multitude of keys to the Asilidae (robber-flies) - http://www.geller-grimm.de/key.htm

Tentative key to the subfamilies of robber-flies (Asilidae) - http://www.mapress.com/zootaxa/2011/f/zt03031p046.pdf

Photo-guide to the robberflies of Northern Europe (in Dutch) - http://waarneming.nl/download/fotogidsAsilidae.pdf

Bombyliidae:

Key to the bee-flies (Bombyliidae) of NW Europe - http://home.hccnet.nl/mp.van.veen/bombyliidae/index.html

Erica McAlister's NHM guide to bee-flies - http://www.nhm.ac.uk/natureplus/blogs/diptera-blog/2011/04/12/beeflies?fromGateway=true

Calliphoridae:

RES out-of-print handbook on Calliphoridae - http://www.royensoc.co.uk/sites/default/files/Vol10_Part04a_2_Calliphoridae.pdf

Guide to the greenbottles - http://thetopshamnaturalist.blogspot.co.uk/2010/02/six-green-bottles.html & http://thetopshamnaturalist.blogspot.co.uk/2010/03/more-greenbottles.html

Camillidae:

Key to the Western European species of genus Camilla - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=7

Clusiidae:

Key to the world genera (and North American species) of Clusiidae - http://www.biology.ualberta.ca/bsc/ejournal/lcm_14/lcm_14.html

Conopidae:

Key to the thick-headed flies (Conopidae) of NW Europe - http://home.hccnet.nl/mp.van.veen/conopidae/index.html

RES out-of-print handbook on Conopidae - http://www.royensoc.co.uk/sites/default/files/Vol10_Part03a.pdf

Conopidae of the Netherlands (in Dutch) - http://www.repository.naturalis.nl/document/491918

Diopsoidae (stalk flies):

Darwyn Sumner's key to stalk flies - http://www.dipteristsforum.org.uk/documents/Diopsoidea.pdf

Dolichopodidae:

RES out-of-print handbook on Dolichopodidae - http://www.royensoc.co.uk/sites/default/files/Vol09_Part05.pdf

Checklist and keys to Dolichopodidae of northern Europe - http://www.diptera.info/downloads/Grichanov_N_Europe.pdf

Checklist and keys to Dolichopodidae of the Caucasus & Eastern Mediterranean - http://www.diptera.info/downloads/Grichanov_2007b.pdf

Keys to the species of genus Aphrosylus, Campsicnemus, & Diaphorus - https://sites.google.com/site/mikesinsectkeys/Home/diptera/dolichopodidae

Empididae:

Keys to Empididae - https://sites.google.com/site/mikesinsectkeys/Home/diptera/empididae

Key to European species of genus Stilpon - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=4

Heleomyzidae:

Key to the British species of genus Suillia - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=19

Hybotidae:

Key to Hybotidae - https://sites.google.com/site/mikesinsectkeys/Home/diptera/hybotidae

Key to genera and species of Hybotidae - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=18

Key to the West-Palaearctic species of Elaphropeza - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=16

Lauxaniidae:

Terminalia of Eastern European Lauxaniidae - http://www.diptera.info/downloads/Remm_Elberg_1979.pdf

Lonchaeidae:

Lonchaeidae online, including key - http://lonchaeidae.myspecies.info/

Muscidae:

RES out-of-print handbook on Muscidae - http://www.royensoc.co.uk/sites/default/files/Vol10_Part04b.pdf

Identification of the house-fly, Musca domestica - http://www.icb.usp.br/~marcelcp/Muscadomestica.htm

Pest Muscidae species - http://influentialpoints.com/Gallery/Stable_flies_and_Face_flies.htm

Nerioidea (stilt-legged flies):

Darwyn Sumner's key to Nerioidea - http://www.dipteristsforum.org.uk/documents/Nerioidea.pdf

Phoridae (scuttle-flies):

Key to the European species of Phalacrotophora (Phoridae) parasitic on ladybirds - http://www.diptera.info/downloads/Disney_Beuk_1997.pdf

ID of Phalacrotophora beuki (Phoridae) - http://www.diptera.info/downloads/Durska_Ceryngier_Disney_2003.pdf

Pipunculidae:

Key to genera of Pipunculidae: http://davidjgibbs.webs.com/downloads/Key%20to%20the%20genera.pdf

Test key to Dorylomorpha (Pipunculidae) - http://davidjgibbs.webs.com/downloads/Dorylomorpha%20key.pdf

Test key to Cephalops (Pipunculidae) - http://davidjgibbs.webs.com/downloads/Cephalops%20key.pdf

Key to European genera/tribes of Pipunculidae - http://www.kehlmaier.de/pipunculidae1.html

Rhagionidae (snipe-flies):

Key to the snipe-flies (Rhagionidae & Athericidae) of NW Europe - http://home.hccnet.nl/mp.van.veen/KEYS/Rhagionidae/Rhagionidae.html

Syrphidae:

Guide to hoverflies (& recording) - http://www.hoverfly.org.uk/portal.php

RES out-of-print handbook on Syrphidae - http://www.royensoc.co.uk/sites/default/files/Vol10_Part01.pdf

UK-hoverflies Yahoo group - http://tech.groups.yahoo.com/group/UK-Hoverflies/

Sphaerophoria terminalia images to clarify diagrams on pages 104-107 in Stubbs & Falk - http://www.invertebrate-challenge.org.uk/media/187574/sphaerophoria_terminalia_print_res.pdf

Neoascia and Sphegina species, images of the chitinous bridge character of Stubbs & Falk - http://www.invertebrate-challenge.org.uk/media/519024/chitinous_bridge_feature.pdf

Syrphid database (traits, phenology, habitat associations, etc) - http://www.iol.ie/~millweb/syrph/syrphid.htm

Syrphidae of Germany - http://www.syrphidae.de/schwebfliege-einzeln/index.html

Syrphids in Germany - http://www.kehlmaier.de/syrphidae.html

Photogallery of British hoverflies - http://syrphidae.3644.co.uk/

Naturespot hoverfly gallery - http://www.naturespot.org.uk/taxonomy/term/19415

Tabinidae:

Biting tabanids - http://influentialpoints.com/Gallery/Horseflies_Clegs_and_Deerflies.htm

Tachinidae:

RES out-of-print handbook on Tachinidae - http://www.royensoc.co.uk/sites/default/files/Vol10_Part04a_1_Tachinidae.pdf

Tachinidae recording scheme (gallery) - http://tachinidae.org.uk/site/index.php

Various keys from the Tachinidae recording scheme - http://tachinidae.org.uk/blog/?page_id=156

Tachinid Times newsletter - http://www.nadsdiptera.org/Tach/TTimes/TThome.htm

North American Dipterist's society Tachinidae page (includes good morphology page) - http://www.nadsdiptera.org/Tach/home.htm

MOSCHweb - interactive key to Tachinid genera of Western Europe - http://www.tachinidae.eu/

Therevidae (stiletto-flies):

Key to the stiletto-flies (Therevidae) of NW Europe - http://home.hccnet.nl/mp.van.veen/therevidae/therevidae.html

Xylomidae:

Key to some European species of Xylomidae - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=10

Xylophagidae:

Key to the Xylophagidae of NW Europe - http://home.hccnet.nl/mp.van.veen/kleinefamilies/XYLOPHAG_e.HTM

The European species of genus Xylophagus - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=3

Nematocera:

Clues to families of the Nematocera - http://www.entomology.umn.edu/museum/links/coursefiles/Nematocera%20characters.html

RES out-of-print handbook on Nematocera: families Trichoceridae to Culicidae - http://www.royensoc.co.uk/sites/default/files/Vol09_Part02_2_Trichoceridae-Culicidae.pdf

Anisopodidae:

Key to the Palaearctic species of genus Silvicola - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=1

Keys to Anisopodidae-Mycetobiidae - https://sites.google.com/site/mikesinsectkeys/Home/diptera/anisopodidae-mycetobiidae

Cecidomyiidae:

Keys to the subfamilies & genus of Cecidomyiidae - https://sites.google.com/site/mikesinsectkeys/Home/diptera/cecidomyiidae

Ceratopogonidae (biting midges):

Key to Culicoides midges (of vetinary importance) - http://www.culicoides.net/taxonomy/identification-keys/UK01-1

ID of mosquitoes and biting midges - http://influentialpoints.com/Gallery/Mosquitoes_and_Biting_Midges.htm

Chironomidae (non-biting midges):

RES out-of-print handbook on Chironomidae - http://www.royensoc.co.uk/sites/default/files/Vol09_Part02_3_Chironomidae.pdf

Culicidae (mosquitoes):

ID of mosquitoes and biting midges - http://influentialpoints.com/Gallery/Mosquitoes_and_Biting_Midges.htm

Mycetobiidae:

Keys to Anisopodidae-Mycetobiidae - https://sites.google.com/site/mikesinsectkeys/Home/diptera/anisopodidae-mycetobiidae

Psychopteridae:

Atlas and key to Psychopteridae - http://nora.nerc.ac.uk/7509/1/Ptychopterid_Craneflies.pdf

Scatopsidae, the dung-midges:

Scatopsidae of Europe key - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=23

Tipulidae, the craneflies:

ID guide to the crane-flies (Tipulidae) of Pennsylvania - http://iz.carnegiemnh.org/cranefly/idkeys.htm

RES out-of-print handbook on Tipulidae - http://www.royensoc.co.uk/sites/default/files/Vol09_Part02_1_Tipulidae.pdf

The West Palearctic species of Ctenophorinae (key) - http://www.nev.nl/eb/EB-2006/EB-66(5)/2006-138-149-Oosterbroek.pdf

Alan Stubbs' draft keys to craneflies - http://www.dipteristsforum.org.uk/viewtopic.php?pid=1609#p1609

Cranefly wing veination diagrams - http://www.dipteristsforum.org.uk/documents/Venation.pdf

Ulidiidae:

Key to European Ulidia - http://www.online-keys.net/infusions/keys/keys_print.php?key_no=9

Ephemoptera (Mayflies):

Mayfly recording scheme - http://www.ephemeroptera.pwp.blueyonder.co.uk/

Old site (half dead but keys appear intact) - http://www.ephemeroptera.britannica.freeservers.com/Contents.htm

RES out-of-print handbook on Ephemoptera - http://www.royensoc.co.uk/sites/default/files/Vol01_Part09.pdf

Tips for identifying mature Ecdynurus larvae - http://mostlyaboutmayflies.wordpress.com/2011/08/08/tips-for-identifying-ecdyonurus-larvae/

Key to the larvae (families) of British mayflies - http://www.fba.org.uk/recorders/publications_resources/keys/mayfly/contentParagraph/03/document/MayflyKey_Comp.pdf

Key to the world genera of larval & adult-male Heptageniidae - http://www.biology.ualberta.ca/bsc/ejournal/wm_07/wm_07.html

Naturespot mayfly gallery - http://www.naturespot.org.uk/taxonomy/term/19482

Hemiptera (true bugs):

Guide to the bugs (sub-order Hemiptera) - http://www.britishbugs.org.uk/index.html

Guide to the bugs (sub-order Homoptera - key to hopper families) - http://www.ledra.co.uk

Occasional web publication of hemipteran news, sometimes with keys - http://www.hetnews.org.uk/

Het news 1: Micronecta minutissima group ID, inc. gen det - http://www.hetnews.org.uk/pdfs/Issue%201_Spring%202003_383Kb.pdf

Het news 2: ID of, & key to Nysius spp - http://www.hetnews.org.uk/pdfs/Issue%202_Autumn%202003_397Kb.pdf

Het news 3: ID of Lygus spp - http://www.hetnews.org.uk/pdfs/Issue%203_Spring%202004_422Kb.pdf

Het nes 4: ID guide to Nezara viridula, Southern Green Shieldbug - http://www.hetnews.org.uk/pdfs/Issue%204_Autumn%202004_202Kb.pdf

Het news 5: identifying Sigara iactens & splitting Peritrechus nubilis & P. geniculatus - http://www.hetnews.org.uk/pdfs/Issue%205_Spring%202005_380Kb.pdf

Het news 6: ID of Nysius huttoni & Notonecta lutea - http://www.hetnews.org.uk/pdfs/Issue%206_Autumn%202005_%20631Kb.pdf

Het news 7: ID of Corixa iberica & C. punctata - http://www.hetnews.org.uk/pdfs/Issue%207_Spring%202006_853Kb.pdf

Het news 9: ID features of Sigara (Subsigara) spp. & separation of female Sigara limitata & S. nigrolineata - http://www.hetnews.org.uk/pdfs/Issue%209_Spring%202007_620Kb.pdf

Het news 10: ID features of Lygus spp. - http://www.hetnews.org.uk/pdfs/Issue%2010_Autumn%202007_820Kb.pdf

Het news 11: ID features of Sigara dorsalis & S. striatus - http://www.hetnews.org.uk/pdfs/Issue%2011_Spring%202008_1667Kb.pdf

Het news 12: Leptoglossus occidentalis & ID of Velia spp (water-crickets) - http://www.hetnews.org.uk/pdfs/Issue%2012_Autumn%202008_2422Kb.pdf

Het news 13: Macrolophus spp. in Britain - http://www.hetnews.org.uk/pdfs/Issue%2013_Spring%202009_906kb.pdf

Het news 16: Splitting Tritomegas sexmaculatus, T. rotundipennis & T. bicolor - http://www.hetnews.org.uk/pdfs/Issue%2016_Autumn%202010_1170kb.pdf

Het news 17: Tritomegas sexmaculatus & T. bicolor nymphs - http://www.hetnews.org.uk/pdfs/Issue%2017-18_Definitive1.1.pdf

Key to Anthocoris spp - http://www.hetnews.org.uk/pdfs/Anthocoris_key_3pp.pdf

Shieldbug vice-county distribution - http://www.hetnews.org.uk/docs/VC_Distn_Penta_02_Jun_05_RO.zip

Cross-reference of names in Southwood & Leston with current names - http://www.hetnews.org.uk/pdfs/S&L-Equivs-bsnau2006.pdf

Het news 1.1: keys to Anthocoris spp. & Phytocoris spp. - http://www.hetnews.org.uk/pdfs/HN1.pdf

Het news 1.3: notes on Miridae, & separation of Corixa punctata & C. panzeri - http://www.hetnews.org.uk/pdfs/HN3.pdf

Het news 1.4: draft keys to Miridae, ID notes on Psallus spp., key to Microvelia spp. - http://www.hetnews.org.uk/pdfs/HN4.pdf

Het news 1.5: ID notes on aquatic bugs, and immature stages of mirids & shieldbugs - http://www.hetnews.org.uk/pdfs/HN5.pdf

Het news 1.6: Key to Loricula spp., more notes on Psallus - http://www.hetnews.org.uk/pdfs/HN6.pdf

Het news 1.8: ID features of Empicoris spp. & several Corixid species - http://www.hetnews.org.uk/pdfs/HN8.pdf

Het news 1.10: Key to Plagiognathus spp. - http://www.hetnews.org.uk/pdfs/HN10.pdf

Het news 1.11: Key to Conostethus spp. & notes on bugs on birch - http://www.hetnews.org.uk/pdfs/HN11.pdf

Guide to the subfamilies of leafhoppers (Cicadellidae) - http://www.inhs.uiuc.edu/~dietrich/subfam/guide.html

Key to the adult Lesser water-boatmen (Corixidae) - http://www.field-studies-council.org/fieldstudies/documents/vol7.3_199.pdf

RES out-of-print handbook on Cicadomorpha (excluding Deltocephalinae and Typhlocybinae) - http://www.royensoc.co.uk/sites/default/files/Vol02_Part02a.pdf

RES out-of-print handbook on Cicadomorpha - Deltocephalinae - http://www.royensoc.co.uk/sites/default/files/Vol02_Part02b.pdf

RES out-of-print handbook on Fulgoromorpha - http://www.royensoc.co.uk/sites/default/files/Vol02_Part03.pdf

RES out-of-print handbook on Aphidoidea (Chaitophoridae & Callaphididae) - http://www.royensoc.co.uk/sites/default/files/Vol02_Part04a.pdf

RES out-of-print handbook on Psylloidea - http://www.royensoc.co.uk/sites/default/files/Vol02_Part05a.pdf

Steve Falk's hemiptera flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157631681890925/

Gilles San Martin's bat gallery (including Cimex species found on bats) - http://www.flickr.com/photos/sanmartin/sets/72157607324817041/

Tristan Bantock (Hemiptera national recorder)'s Flickr set - http://www.flickr.com/photos/tristanba/tags/hemiptera/

Richard Comont's Hemiptera flickr set - http://www.flickr.com/photos/rcomont/sets/72157626381555527/

Scale-insects of Bedfordshire - http://www.bnhs.co.uk/focuson/scales/html/index.htm

Scale-insect checklist - http://scalenet.info/

Russian page on the flatbugs, Aradidae - http://macroid.ru/determination.php?cat=597

Psyllids of Britain (includes checklist) - http://britishpsyllids.taxon.name/

Review of invasive scale insects in Europe - http://www.pensoft.net/J_FILES/2/articles/610/45-G-1-layout.pdf

Scale insect pests (google books) - http://books.google.co.uk/books?id=jhRxGuuCY1kC&pg=PA114&lpg=PA114&dq=Lichtensia+viburni&source=bl&ots=cZNcKkmtpN&sig=-b-S0XwYhC0zk8s8LE7k9dbnI2g&hl=en&sa=X&ei=bFcuUYuSEqKM0wXX24HoBw&ved=0CF0Q6AEwCA#v=onepage&q=Lichtensia%20viburni&f=false

Aphids on the world's plants (online version of the two books, inc keys, galleries, etc) - http://www.aphidsonworldsplants.info/index.htm

Photogalleries & info on aphid genera ID, & aphids on various plant species - http://influentialpoints.com/Gallery/Aphid_genera.htm

Heteroptera photo gallery - http://www.flickr.com/photos/robryanbugs/sets/

Hemiptera of Lincolnshire photo gallery - http://heteropter.wetpaint.com/photos/albums

The Miridae of Denmark (photo gallery, in Danish) - http://www.miridae.dk/index.htm

Corisa, a German guide to heteroptera (in German, includes genital figs) - http://www.corisa.de/index.html

Cicadellinae of the world (inc key) - http://naturalhistory.museumwales.ac.uk/sharpshooters/home.php

Heteroptologie - bugs of Europe (gallery, in German) - http://heteropterologie.de/

Bugs of Germany (in German) - http://www.golddistel.de/wanzen/index.htm

Gallery of German bugs (in German) - http://www.koleopterologie.de/heteroptera/index.html

Heteroptera of Slovenia - http://www2.pms-lj.si/heteroptera/index.htm

Naturespot bug gallery - http://www.naturespot.org.uk/taxonomy/term/19373

Hymenoptera:

The Bees, Wasps & Ants Recording Scheme (BWARS) (photo guide) - http://www.bwars.com/ Downloads at http://www.bwars.com/index.php?q=content/identification-guides-download

BWARS guide to simple, common species - http://www.bwars.com/index.php?q=content/beginners-bees-wasps-and-ants

Steve Falk's Hymenoptera flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629294459686/

Richard Comont's Hymenoptera flickr set - http://www.flickr.com/photos/rcomont/sets/72157625534397759/

INTkeys to Hymenoptera - http://www.hymatol.org/keys.html

Bees of Ireland - http://pollinators.biodiversityireland.ie/

Atlas of the Hymenoptera (in French) - http://zoologie.umh.ac.be/hymenoptera/

Hymenoptera Information System - http://hymis.eu/

Naturespot bees, wasps & ants gallery - http://www.naturespot.org.uk/taxonomy/term/19396

Apoidea (bees):

Steve Falk's bee flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157631518508520/

Steve Falk's bee addenda flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629755137623/

Richard Comont's flickr set of Osmia bicolor - http://www.flickr.com/photos/rcomont/sets/72157629362420434/

Bees of the Netherlands - http://wildebijen.nl/wildebijen.html

BWARS Bees of Britain book, including key to genera - http://www.bwars.com/index.php?q=content/bees-britain

Apidae (Bumblebees & honeybees):

Bumblebees of Warwickshire (key & pictures) - http://www.bwars.com/sites/www.bwars.com/files/diary_downloads/WarwickshiresBumblebees.pdf

Picture key to bumblebees of Britain - http://www.nhm.ac.uk/research-curation/research/projects/bombus/key_british_colour.html

Solitary bees:

A visual guide to the British Coelioxys bees - http://www.bwars.com/sites/www.bwars.com/files/diary_downloads/Coelioxys-guide_lowres.pdf

Test key to Hylaeus bee species - http://www.bwars.com/sites/www.bwars.com/files/diary_downloads/hylaeus-test-key_stubbs_2007.pdf

Formicidae (ants):

RES out-of-print handbook on Formicidae - http://www.royensoc.co.uk/sites/default/files/Vol06_Part03c.pdf

Steve Falk's ant flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157631291327636/

Separating red ants (Myrmica scabrinodis, M. sabuleti and M. specioides) - text http://www.bwars.com/sites/www.bwars.com/files/diary_downloads/myrmica-scapes-text.pdf pics http://www.bwars.com/sites/www.bwars.com/files/diary_downloads/myrmica-scabrinodis-group-scapes-images.pdf

Stenamma species - http://www.bwars.com/sites/www.bwars.com/files/diary_downloads/Stenamma_key.pdf

Highland Ants: Distribution, Ecology and Conservation (Macdonald, 2013) - http://www.hbrg.org.uk/AntAtlas/DownloadAntAtlas.html

Antweb (great pictures!) -- http://www.antweb.org/

Separating worker Lasius niger/L. platythorax - http://sifolinia.blogspot.co.uk/2008/09/separating-lasius-niger-and-lasius.html

Sifolinia's antblog - http://sifolinia.blogspot.co.uk/

Symphyta (saw-flies):

RES out-of-print handbook on Symphyta - http://www.royensoc.co.uk/sites/default/files/Vol06_Part02a.pdf

RES out-of-print handbook on Symphyta - http://www.royensoc.co.uk/sites/default/files/Vol06_Part02b.pdf

RES out-of-print handbook on Symphyta - http://www.royensoc.co.uk/sites/default/files/Vol06_Part02c.pdf

The Symphyta forum (inc larval gallery) - http://tech.groups.yahoo.com/group/sawfly/

Sawfly Study Group newsletters and British checklist - http://www.record-lrc.co.uk/c2.aspx?Mod=Downloads&Do=ListFile&SubCategoryID=48

Naturespot sawfly gallery - http://www.naturespot.org.uk/taxonomy/term/19410

Wasps:

RES out-of-print handbook on Hymenoptera - Introduction and key to families (2nd edition) - http://www.royensoc.co.uk/sites/default/files/Vol06_Part01(ed2).pdf

Chris Raper's notes on Parasitica (inc. which keys are available for each group) - http://chrisraper.org.uk/Html/parasitica.htm

Bethyloidea:

RES out-of-print handbook on Bethyloidea (excluding Chrysididae) - http://www.royensoc.co.uk/sites/default/files/Vol06_Part03a.pdf

Braconidae:

RES out-of-print handbook on Classification & biology of Braconidae - http://www.royensoc.co.uk/sites/default/files/Vol07_Part11.pdf

Richard Comont's flickr set of Dinocampus coccinellae - http://www.flickr.com/photos/rcomont/sets/72157629791085212/

Chalcidae:

RES out-of-print handbook on Chalcidoidea Section a - http://www.royensoc.co.uk/sites/default/files/Vol08_Part02a.pdf

RES out-of-print handbook on Chalcidoidea. Section b - http://www.royensoc.co.uk/sites/default/files/Vol08_Part02b.pdf

Universal Chalcidoidae Database - http://www.nhm.ac.uk/research-curation/research/projects/chalcidoids/

Cynipoidae:

RES out-of-print handbook on Cynipoidea. Key to families and subfamilies and Cynipinae (including galls) - http://www.royensoc.co.uk/sites/default/files/Vol08_Part01a.pdf

RES out-of-print handbook on Cynipoidea. Eucoilidae - http://www.royensoc.co.uk/sites/default/files/Vol08_Part01b.pdf

Diapriidae:

RES out-of-print handbook on Proctotrupoidea. Diapriidae subfamily Belytinae - http://www.royensoc.co.uk/sites/default/files/Vol08_Part03d_ii.pdf

Eumenidae:

British potter and mason wasps (Eumenidae) (Archer) - http://www.bwars.com/sites/www.bwars.com/files/diary_downloads/Archer_Mason&Potter_wasp_key.pdf

Ichneumonidae:

Key to the subfamilies of the Ichneumonidae - http://www.brc.ac.uk/downloads/Ichneumonidae_subfamily_key.pdf

RES out-of-print handbook on Ichneumonoidea (Pimplinae) - http://www.royensoc.co.uk/sites/default/files/Vol07_Part01.pdf

RES out-of-print handbook on Ichneumonoidea - http://www.royensoc.co.uk/sites/default/files/Vol07_Part02a_i.pdf

RES out-of-print handbook on Ichneumonoidea - http://www.royensoc.co.uk/sites/default/files/Vol07_Part02a_ii.pdf

RES out-of-print handbook on Ichneumonidae - Orthopelmatinae & Anomaloninae - http://www.royensoc.co.uk/sites/default/files/Vol07_Part02b.pdf

Splitting Ophioninae from Netalia spp. - http://www.amentinst.org/GIN/Ophioninae/ophionines.php

Identifying Ophion obscuratus - http://www.nhm.ac.uk/nature-online/species-of-the-day/scientific-advances/bio-control/ophion-obscuratus/taxonomy/index.html

Notes on the ID of Ichneumonid wasps - http://www.ispot.org.uk/node/100349

Useful notes on parasitoid wasps - http://www.ynu.org.uk/insects/parasitic%20wasps/%20Ichneumonoideae%20sub%20families

Pompilidae:

RES out-of-print handbook on Pompilidae - http://www.royensoc.co.uk/sites/default/files/Vol06_Part04.pdf

Vespidae (social wasps):

Key to the paper and social wasps of central Europe (Dvorak & Roberts, 2006) - http://www.nev.nl/hymenoptera/2006DvorakRoberts_key_Vespidae.pdf

Steve Falk's social wasp flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629294465012/

Comparative ID of social wasps - http://www.eakringbirds.com/eakringbirds2/insectswaspsidentification.htm

Key to the social wasps of Britain - http://bio.kuleuven.be/ento/courses/waspsp1600dpi.pdf & http://bio.kuleuven.be/ento/courses/waspsp2600dpi.pdf

Lepidoptera (butterflies and moths):

Butterfly Conservation - http://butterfly-conservation.org/

Moths & butterflies of Europe & North Africa: http://www.leps.it/

Photo guide to the Cockayne collection of butterflies & moths - http://www.nhm.ac.uk/research-curation/scientific-resources/biodiversity/uk-biodiversity/cockayne/?referer=www.britishbutterflies.co.uk

Eggs, larvae, pupae and adults of the British lepidoptera - http://www.ukleps.org/

Lepiforum (in German, but copious pics & Latin names) - http://www.lepiforum.de/

Butterflies and moths of Northern Ireland - http://www.habitas.org.uk/moths/frameset.html

Gallery of the lepidoptera of Ireland - http://www.habitas.org.uk/invertebrateireland/image.asp?Checklist=11

Garden Moth Scheme - http://gms.staffs-ecology.org.uk/index.php

Lepidoptera of Finland (in Finnish) - http://www.dlc.fi/~peterpa/lepi/perhonen.htm

Microlepidoptera of Finland (in Finnish) - http://www.kolumbus.fi/silvonen/micro/index.htm

Lepidoptera of Sweden (in Swedish) - http://www2.nrm.se/en/svenska_fjarilar/

Lepidoptera of Belgium - http://webh01.ua.ac.be/vve/Checklists/Lepidoptera/LepMain.htm

Naturespot caterpillar page - http://www.naturespot.org.uk/taxonomy/term/19327

Dissection:

Lepidoptera Dissection Group (methods, guide to ID) - http://www.dissectiongroup.co.uk/

Moth dissection guide (methods - sp are N. Am) - http://caps.ceris.purdue.edu/webfm_send/728

Moth dissection guide - http://www.north-west-wildlife.co.uk/Moth%20Dissection.htm

Moth dissection reasoning & methods - http://www.angleps.com/Dissection%20Guide.pdf

Butterflies:

OPAL key to 26 common butterfly species - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/Common_butterflies.1.0

Photo guide to butterflies at all life stages (egg, caterpillar, pupa, adult), including seperation of similar species - http://www.ukbutterflies.co.uk

Photo guide to butterfly species - http://www.britishbutterflies.co.uk/index.asp

Big Butterfly Count ID chart - http://www.bigbutterflycount.org/

Butterflies of Central Europe (British species & more) - http://www.guypadfield.com/

Moths Plus butterfly images - http://www.mothsplus.co.uk/PAGES/Butterfly%20images%20page.htm

Gilles San Martin's butterfly eggs (from Belgium but much overlap) - http://www.flickr.com/photos/sanmartin/sets/72157624433198559/

Gilles San Martin's butterfly larvae & pupae (from Belgium but much overlap) - http://www.flickr.com/photos/sanmartin/sets/72157624557955532/

Gilles San Martin's butterfly adults (from Belgium but much overlap) - http://www.flickr.com/photos/sanmartin/sets/72157624433136105/

Richard Comont's flickr butterfly gallery - http://www.flickr.com/photos/rcomont/sets/72157623927583165/

Naturespot butterfly gallery - http://www.naturespot.org.uk/taxonomy/term/19277

Moths:

Photo guide to British moths - http://ukmoths.org.uk/

Moths Count - http://www.mothscount.org/

Jeff Higgott's UK Leps (photo guide and feeding signs) - http://www.ukleps.co.uk/

What moths are flying tonight in Suffolk? - http://www.suffolkmoths.org.uk/cgi-bin/flyingTonight.cgi

Moths Plus micromoth images - http://www.mothsplus.co.uk/PAGES/Micro%20moth%20photos.htm

Moths Plus macromoth images - http://www.mothsplus.co.uk/PAGES/Moth%20image%20list.htm

'Mint moths' (Pyrausta spp) ID guide - http://www.upperthames-butterflies.org.uk/Moth_files/Pyraustas_difficult_moths.pdf

Grass moths (Crambids) ID guide - http://sites.google.com/site/berksmoths/resources/CrambinaeEd2March09HiRes.pdf?attredirects=0&d=1

Moths per month in Berkshire (what's flying now) - http://sites.google.com/site/berksmoths/resources/Mothsbymonth-Berkshiremacromoths.pdf?attredirects=0&d=1

Berkshire moth group - https://sites.google.com/site/berksmoths/Home

Norfolk moths ('a reference guide and photo gallery to the moths of Norfolk') - http://www.norfolkmoths.co.uk/

Moths of Suffolk (includes species comparison tool, photo gallery) - http://www.suffolkmoths.org.uk/mos/index.shtml

Somerset moth group (includes 'what's flying tonight' and photo gallery) - http://www.somersetmothgroup.org.uk/portal

Hampshire moth group (includes more background info than many others) - http://www.hantsmoths.org.uk/index.htm

Moth image gallery - http://www.mothshots.com/

Pug moths of Lancashire (but useful far beyond!) - http://www.lancashiremoths.co.uk/visitor/IdentificationHints.aspx

Richard Comont's flickr moth gallery - http://www.flickr.com/photos/rcomont/sets/72157623899316830/

Guide to macromoth families - http://www.opalexplorenature.org/sites/default/files/7/file/GMSmothtips-2-Aug2010.pdf

Guide to micromoth families - http://www.opalexplorenature.org/sites/default/files/7/file/GMSmothtips3micromoths.pdf

Gelechiid recording scheme (gallery, maps and more) - http://www.gelechiid.co.uk/index.php?q=node/1

Chris Lewis' British lepidoptera page - http://britishlepidoptera.weebly.com/index.html

Separating Clouded and Lead-Coloured Drabs - http://pbc.codehog.co.uk/bhs/drabs/drabs.htm

Moths of Germany (Lepiforum, in German) - http://www.lepiforum.de/cgi-bin/lepiwiki.pl?Bestimmungshilfe

Micromoths of the Netherlands - http://www.microlepidoptera.nl/

Catalogue of Tortricidae - http://www.tortricidae.com/default.asp

Naturespot moth page - http://www.naturespot.org.uk/taxonomy/term/19283

Neuroptera (inc Mecoptera, Megaloptera) (Lacewings, scorpionflies, alderflies):

RES out-of-print handbook on Mecoptera, Megaloptera, & Neuroptera - http://www.royensoc.co.uk/sites/default/files/Vol01_Part12+13.pdf

Guide to ID of male Panorpa (scorpionflies) - http://thetopshamnaturalist.blogspot.co.uk/2010/05/scorpion-flies.html

Wild About Britain Panorpa (scorpionflies) discussion - http://www.wildaboutbritain.co.uk/forums/insects-and-invertebrates/100617-scorpion-fly-panorpa-germanica-pls.html

Comparative image of Panorpa (scorpionfly) genital capsule - http://www.wildabouttheworld.com/gallery/showphoto.php/photo/8541

Gilles San Martin's Neuroptera gallery (Belgium but much overlap) - http://www.flickr.com/photos/sanmartin/sets/72157611117970827/

Naturespot lacewing and scorpionfly gallery - http://www.naturespot.org.uk/taxonomy/term/19491

Odonata (Dragonflies & Damselflies):

OPAL key to dragonfly & damselfly species - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/odonata.1.3

OPAL guide to dragonfly & damselfly species - http://www.opalexplorenature.org/sites/default/files/7/file/Dragonfly-guide-FINAL.pdf

Odonata of the Netherlands (in Dutch) - http://home.hccnet.nl/mp.van.veen/libellen/Index.html

British Dragonfly Society ID guide - http://www.british-dragonflies.org.uk/index.php?q=content/uk-species

Guide and key to the dragonflies & damselflies of Ireland - http://www.habitas.org.uk/dragonflyireland/

Photo gallery of the dragonflies & damselflies of Ireland - http://www.habitas.org.uk/invertebrateireland/image.asp?Checklist=3

RES out-of-print handbook on Odonata - http://www.royensoc.co.uk/sites/default/files/Vol01_Part10.pdf

Steve Falk's Odonata flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629587472171/

Richard Comont's Odonata flickr set - http://www.flickr.com/photos/rcomont/sets/72157625534420313/

Dragonflies of Dorset - http://www.dorsetdragonflies.org.uk/dragonflies.php

Damselflies of Dorset - http://www.dorsetdragonflies.org.uk/damselflies.php

Chris Brooks' dragonfly page - http://www.dragonfly-images.co.uk/#/quick-id-guide/4532713573

Naturespot Odonata gallery - http://www.naturespot.org.uk/taxonomy/term/19331

Orthoptera (grasshoppers, crickets, and bush-crickets):

Orthoptera & allied insects recording scheme (grasshoppers, crickets, bush-crickets, cockroaches, earwigs, stick insects, praying mantids) - http://www.orthoptera.org.uk/

Orthoptera species accounts - http://www.orthoptera.org.uk/species_orthoptera.aspx?userid=0

Grasshoppers & crickets of the Netherlands (in Dutch) - http://home.hccnet.nl/mp.van.veen/sprinkhanen/sprinkhanen.html

RES out-of-print handbook on Orthoptera & Dermaptera - http://www.royensoc.co.uk/sites/default/files/Vol01_Part05.pdf

Naturespot Orthoptera gallery - http://www.naturespot.org.uk/taxonomy/term/19476

Photo-guide to common grasshoppers & bush-crickets - http://www.orthoptera.org.uk/recording/sites/default/files/common%20bush-crickets%20and%20grasshoppers.pdf

Orthoptera song files (12 mb zip file) - http://www.orthoptera.org.uk/recording/index.php?q=node/707

Phasmida (stick insects):

Species accounts - http://www.orthoptera.org.uk/species_phasmida.aspx?userid=0

Naturalised species ID guide - http://phasmid-study-group.org/content/Naturalised-British-Stick-Insects-Malcolm-Lee

Photo-guide to earwigs, cockroaches & stick insects -  http://www.orthoptera.org.uk/recording/sites/default/files/earwigs,%20cockroaches%20and%20stick-insects.pdf

Plecoptera (Stoneflies):

RES out-of-print handbook on Plecoptera - http://www.royensoc.co.uk/sites/default/files/Vol01_Part06.pdf

Key to larvae of the British stoneflies - http://www.fba.org.uk/recorders/publications_resources/keys/stonefly/contentParagraph/01/document/KeyToNymphsOfStoneflies.pdf

Naturespot stonefly gallery - http://www.naturespot.org.uk/taxonomy/term/19499

Pscoptera (barkflies):

Pscoptera recording scheme, with key & gallery - http://www.brc.ac.uk/schemes/barkfly/homepage.htm

RES out-of-print handbook on Psocoptera - http://www.royensoc.co.uk/sites/default/files/Vol01_Part07.pdf

Naturespot Pscoptera gallery -  http://www.naturespot.org.uk/taxonomy/term/19468

Siphonaptera (fleas):

RES out-of-print handbook on fleas - http://www.royensoc.co.uk/sites/default/files/Vol01_Part16.pdf

Naturespot flea gallery - http://www.naturespot.org.uk/taxonomy/term/21558

Thysanoptera (thrips):

Naturespot thrips gallery - http://www.naturespot.org.uk/taxonomy/term/19512

Trichoptera (caddisflies):

RES out-of-print handbook on Trichoptera, Hydroptilidae - http://www.royensoc.co.uk/sites/default/files/Vol01_Part14a.pdf

Checklist and keys to the caddisflies of Fennoscandia - http://trichoptera.insects-online.de/Trichoptera%20fennoscandinavica-aktuell/introduction.htm

Naturespot caddisfly gallery - http://www.naturespot.org.uk/taxonomy/term/19486

Other invertebrates:

Annelida (Worms):

Oligochaeta:

Lumbricidae (Earthworms):

OPAL simple key to common earthworm species - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/easy-worms.0.5 & http://www.opalexplorenature.org/sites/default/files/7/file/Field-guide-OPAL-online.pdf

OPAL key to the 12 commonest British earthworm species - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/worm.1.11

NHM earthworm gallery - http://www.nhm.ac.uk/nature-online/life/other-invertebrates/earthworm-slideshow/index.html

FBA key to the aquatic Oligochaeta - http://www.fba.org.uk/sites/default/files/A%20Guide%20for%20the%20Identification%20of%20British%20Aquatic%20Oligochaeta.pdf

Naturespot worms, leeches & flatworm gallery - http://www.naturespot.org.uk/taxonomy/term/19586

Hirudinea:

Guide to 11 freshwater leeches - http://www.bumblebee.org/invertebrates/ANNELIDAb.htm

Naturespot worms, leeches & flatworm gallery - http://www.naturespot.org.uk/taxonomy/term/19586

Polychaeta:

Serpulidae:

Serpulid tubeworms of Pembrokeshire - http://www.field-studies-council.org/fieldstudies/documents/vol2.3_46.pdf

Arachnida:

Synopsis of the Arachnida of the world - https://insects.tamu.edu/research/collection/hallan/acari/0ReportHi.htm

Naturespot spiders, harvestmen and mites page - http://www.naturespot.org.uk/taxonomy/term/19514

Acari (mites):

Key to the water mites (Hydracarina) of the Flatford area - http://www.field-studies-council.org/fieldstudies/documents/vol1.3_19.pdf

Gilles San Martin's bat gallery - http://www.flickr.com/photos/sanmartin/sets/72157624902505391/

NHM Acarology org page - http://www.nhm.ac.uk/hosted_sites/acarology/

Acaribase - http://www.miteresearch.org/db/main.php?genus=5615

Poecilochirus mites (phoretic on beetles, esp. Silphidae) - http://itp.lucidcentral.org/id/mites/invasive_mite/Invasive_Mite_Identification/key/mesostigmata/media/html/Poecilochirus_DN.htm

North American mites associated with bees - http://insects.ummz.lsa.umich.edu/beemites/

Key to genera of some parasitic or phoretic Acari - http://itp.lucidcentral.org/id/mites/invasive_mite/Invasive_Mite_Identification/key/mesostigmata/media/html/parasit.htm

Mite taxonomy - http://www.taxonomy.be/gti_course/taxonspecific/mites-taxonomy/

Aranaea (spiders):

Gallery of the spiders of Ireland - http://www.habitas.org.uk/invertebrateireland/image.asp?Checklist=9

Steve Falk's spider flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157631875078693/

British Arachnological Society's gallery - http://wiki.britishspiders.org.uk/index.php5?title=Photo_Gallery

NHM guide to reports of spider bites in the UK - http://www.nhm.ac.uk/nature-online/life/insects-spiders/identification-guides-and-keys/spider-bites/

Nick's Spider Gallery - http://www.nicksspiders.com/nicksspiders/

British Arachnological Society's guides to separating difficult species - http://wiki.britishspiders.org.uk/index.php5?title=Difficult_Species

Spider Recording Scheme - http://srs.britishspiders.org.uk/portal.php/p/Welcome

Spiders of Europe & Greenland - http://www.jorgenlissner.dk/

Spiders of Germany (in German) - http://www.spiderling.de/arages/Fotogalerie/Fotogalerie.htm

Spiders of Europe - http://www.araneae.unibe.ch/

World of spiders (in French) - http://welcome.bspider.fotki.com/

European spiders - http://www.eurospiders.com/

Spiders of NW Europe - http://ednieuw.home.xs4all.nl/Spiders/spidhome.htm

Spiders of Norway - http://www.edderkopper.net/index.html

Ixodida (ticks):

OPAL key to the  species of female Rhipicephalus (Boophilus) ticks - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/Rhipicephalus%28Boophilus%29_females.0.1

OPAL key to the  species of male Rhipicephalus (Boophilus) ticks - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/Rhipicephalus%28Boophilus%29_males.0.2

Hyalomma (bont-legged) ticks - http://influentialpoints.com/Gallery/Bont-legged_ticks_Hyalomma.htm

Amblyomma (bont-) ticks - http://influentialpoints.com/Gallery/Bont_ticks_Amblyomma.htm

Rhipicephalus (brown-) ticks - http://influentialpoints.com/Gallery/Brown_Ticks_Rhipicephalus.htm

University of Lincoln tick key - http://webpages.lincoln.ac.uk/fruedisueli/FR-webpages/parasitology/Ticks/TIK/tick-key/index.htm

Bristol University key to hard ticks (Ixodidae) - http://bristoltickid.blogs.ilrt.org/key-to-genera/

Opiliones (Harvestmen):

Gallery of harvestmen of Ireland - http://www.habitas.org.uk/invertebrateireland/image.asp?Checklist=10

Steve Falk's Harvestman flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157631637889685/

British Naturalists Association outline of harvestman - http://www.bna-naturalists.org/educ/ident/hvtmen.htm

British Arachnological Society harvestman guide - http://wiki.britishspiders.org.uk/index.php5?title=Category:Opiliones

Excellent guide (& some keys) to harvestmen of Britain (& some Europe) - https://sites.google.com/site/opilionesuk/

Gallery of harvestmen images - http://www.eakringbirds.com/eakringbirds3/harvestmen.htm

Photos of Pine & Red harvestmen (new/rare species) - http://www.ukeconet.co.uk/events/72-news-archives/208-harvestman-september-workshop.html

Harvestmen of the Netherlands (in Dutch) - http://www.janvanduinen.nl/opiliones.php

Pseudoscorpionida (pseudoscorpions):

Pseudoscorpion recording scheme - http://www.chelifer.com/?page_id=81

Old pages of the Pseudoscorpion recording scheme, inc gallery & maps - http://www.chelifer.com/pseudos/pseudoscorpions.htm

Cephalothoraxes & galea of the 3 British Neobisium spp. - http://www.chelifer.com/pseudos/galea2.pdf

Arolium of Larca lata vs Chelifer cancroides - http://www.chelifer.com/pseudos/galea4.pdf

Pseudoscorpions of Northern & Central Europe - http://www.jorgenlissner.dk/pseudoscorpions.aspx

Archeognatha:

Bristletails of Britain, inc key - http://www.bristletail.net/british_isles/index.html

Crustacea:

Cirripedia:

Introduction to the British barnacles - http://www.field-studies-council.org/fieldstudies/documents/vol6.1_161.pdf

Decapoda (crabs and lobsters):

Biology of the shore crab (Carcinas maenas) - http://www.field-studies-council.org/fieldstudies/documents/vol2.4_49.pdf & http://www.field-studies-council.org/fieldstudies/documents/vol2.5_55.pdf

Introduction to the biology of the hermit crab (Pagarus bernhardus) - http://www.field-studies-council.org/fieldstudies/documents/vol7.1_192.pdf

Malacostraca:

Guide to invasive freshwatershrimps & isopods - http://www.fba.org.uk/sites/default/files/InvasiveFWShrimps&Isopods_Dec2012.pdf

Separating Crangonyx, Gammarus & Niphargus - http://www.fba.org.uk/recorders/publications_resources/keys/shrimp/contentParagraph/03/document/SimpleKeyToSelectGAMMARIDEA.pdf

Oniscidea (woodlice & slaters):

British Myriapoda & Isopoda Group (centipedes, millipedes & woodlice) - http://www.bmig.org.uk/

OPAL key to woodlouse species - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/woodlice.0.6

NHM simple key to common woodlice - http://www.nhm.ac.uk/nature-online/life/other-invertebrates/walking-with-woodlice/identification.html

Guide to invasive freshwatershrimps & isopods - http://www.fba.org.uk/sites/default/files/InvasiveFWShrimps&Isopods_Dec2012.pdf

Isopoda of the Netherlands (in Dutch) - http://www.pissebeddenproject.nl/index.html

Synopses of the British fauna 3: marine isopods - http://isopods.nhm.org/pdfs/5121/5121.pdf

Naturespot woodlouse page - http://www.naturespot.org.uk/taxonomy/term/19555

Pycnogonidae (sea spiders):

A revised key to the littoral Pycnogonidae (sea spiders) - http://www.field-studies-council.org/fieldstudies/documents/vol6.3_179_A.pdf (replaces http://www.field-studies-council.org/fieldstudies/documents/vol3.3_77.pdf)

Pycnogonidae around Milford Haven - http://www.field-studies-council.org/fieldstudies/documents/vol6.3_180.pdf

Hexapoda:

Archeognatha:

Bristletails of Britain, inc key - http://www.bristletail.net/british_isles/index.html

Naturespot springtail & bristletail gallery - http://www.naturespot.org.uk/taxonomy/term/19503

Naturespot silverfish gallery - http://www.naturespot.org.uk/taxonomy/term/19501

Collembola (springtails):

Assorted keys to Collembola worldwide - http://www.collembola.org/

Test key to common surface-dwelling Collembola of the UK - http://46.18.32.69/~doehetzelf/key/fkuk.htm

Steve Hopkin's Collembola page - http://www.stevehopkin.co.uk/

Peter Shaw's Collembola page - http://www.chezshaw.demon.co.uk/work/research/collembola/collembola.html

UK Collembola page - http://ws1.roehampton.ac.uk/collembola/index.html

Key to the springtails of the Netherlands - http://www.collembola.org/key/fknl.pdf

Invasive plants & animals review (inc review of the alien springtails in Britain) - http://www.ukeconet.co.uk/images/stories/aliens_proceedings.pdf

Collembola of the Netherlands (in Dutch, includes pictorial key) - http://www.janvanduinen.nl/collembola.html

Naturespot springtail & bristletail gallery - http://www.naturespot.org.uk/taxonomy/term/19503

Diplura:

Bristletails of Britain, inc key - http://www.bristletail.net/british_isles/index.html

RES out-of-print handbook to Thysanura & Diplura - http://www.royensoc.co.uk/sites/default/files/Vol01_Part02.pdf

Thysanura:

RES out-of-print handbook to Thysanura & Diplura - http://www.royensoc.co.uk/sites/default/files/Vol01_Part02.pdf

Zygentoma:

Bristletails of Britain, inc key - http://www.bristletail.net/british_isles/index.html

Mollusca (slugs & snails):

Conchological Society's guide to garden slugs & snails - http://www.conchsoc.org/node/638

Conchological Society's ID section - http://www.conchsoc.org/node/566

Pictorial encyclopedia of the molluscs - http://www.conchsoc.org/encyclopedia

Glossary of molluscan terms - http://www.conchsoc.org/node/568

Photo gallery of the terrestrial and freshwater molluscs of Ireland - http://www.habitas.org.uk/molluscireland/splist.asp

Conchological Society's Yahoo group - http://tech.groups.yahoo.com/group/conchology-uk/

Naturespot slugs and snails gallery - http://www.naturespot.org.uk/taxonomy/term/19567

Bivalvia (bivalve shells):

Marine bivalvia photo gallery - http://www.aphotomarine.com/mollusc_shells_bivalves_marine.html

Marine bivalves of Britain - http://naturalhistory.museumwales.ac.uk/britishbivalves/

Larger freshwater mussels of Britain - http://www.museumwales.ac.uk/media/9480/fw-mussel-1.jpg and http://www.museumwales.ac.uk/media/9481/fw-mussel-2.jpg

Gastropoda (slugs):

A field key to the slugs of the British Isles - http://www.field-studies-council.org/fieldstudies/documents/vol5.5_156_a.pdf

Guide to some common slugs - http://www.cf.ac.uk/biosi/staffinfo/wocs2.html

Guide to some more common slugs - http://adlib.everysite.co.uk/adlib/defra/content.aspx?id=178456

Steve Falk's slug flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157631294214552/

Gastropoda (snails):

Shell Encyclopedia - http://www.conchology.be/?t=64

Guide to the family Vertiginae - http://www.conchsoc.org/node/5388

Guide to the freshwater and brackish-water snails - http://www.conchsoc.org/node/5299

Marine rocky shore snails - http://www.field-studie s-council.org/fieldstudies/documents/vol10.4_273.pdf

Mollusc shells of the Netherlands (in Dutch) - http://home.hccnet.nl/mp.van.veen/Schelpen/start.html

The Common Topshell and related species - http://www.field-studies-council.org/fieldstudies/documents/vol10.1_265.pdf

Introduction to the biology of the dog-whelk (Nucella lappilus) - http://www.field-studies-council.org/fieldstudies/documents/vol6.2_171_COLOUR.pdf

Comparative ecology of the flat periwinkles, Littorina obtusata & L. mariae - http://www.field-studies-council.org/fieldstudies/documents/vol7.3_202.pdf

Key to the family Littorinidae & their Digenean parasites - http://www.field-studies-council.org/fieldstudies/documents/vol2.5_56.pdf

Key to the 39 land snails of the Flatford area - http://www.field-studies-council.org/fieldstudies/documents/vol1.1_4.pdf

Gallery of the snails of Ireland - http://www.habitas.org.uk/invertebrateireland/image.asp?Checklist=2

Marine gastropod snail gallery - http://www.aphotomarine.com/mollusc_shells_gastropod.html

Key to snails of the Bristol region - http://www.brerc.eclipse.co.uk/files/BRERC_snail_key.pdf

German snail page, good plates & morphology (in English) - http://www.molluscs.at/index.html

USA snail page, inc gallery, key - http://idtools.org/id/mollusc/index.php

Nudibranchia:

Guide to the sea slugs (Nudibranchs) of Pembrokeshire - http://www.field-studies-council.org/fieldstudies/documents/vol4.2_101.pdf

Myriapoda (Diplopoda & Chilopoda, millipedes & centipedes):

British Myriapoda & Isopoda Group (centipedes, millipedes & woodlice) - http://www.bmig.org.uk/

Millipedes of Germany (with keys) - http://www.diplopoda.de/html/bestimmung.php

R.I. Pocock (1910) Chilopoda and Diplopoda - http://www.sil.si.edu/DigitalCollections/bca/navigation/bca_11_00_00/bca_11_00_00select.cfm

K.W. Verhoeff (1891): Ein Beitrag zur mitteleuropäischen Diplopodenfauna - Berliner entomologische Zeitschrift 36(1), pp. 115-166 - http://www.biologie.uni-ulm.de/cgi-bin/query_all/litdetails.pl?sid=T&id=18876

Myriapod-info (German) - http://www.myriapoden-info.de/frameindex.htm

Myriapods of the sea shore - http://www.marinespecies.org/myriapoda/index.php

Naturespot centipedes & millipedes gallery - http://www.naturespot.org.uk/taxonomy/term/19543

Diplopoda:

Milli-peet, taxonomy, systematics and evolution of millipedes - http://archive.fieldmuseum.org/millipeet/

Plankton:

Marine zooplankton of southern Britain guides - http://www.mba.ac.uk/2012/10/29/part-2-of-new-plankton-guide-is-available-for-download-makes-zooplankton-identification-easier-for-a-wider-audience/

Guide to sixty common marine diatoms - http://www.field-studies-council.org/fieldstudies/documents/vol5.3_140_A.pdf

Platyhelminthes:

Trematoda:

Key to the family Littorinidae & their Digenean parasites - http://www.field-studies-council.org/fieldstudies/documents/vol2.5_56.pdf

Porifera (sponges):

Sponges of Britain & Ireland - http://www.habitas.org.uk/marinelife/sponge_guide/

Sponges of the British Isles ('Sponge 5') - http://www.habitas.org.uk/marinelife/sponge_guide/sponge5.pdf

Glossary of sponge terms - http://www.habitas.org.uk/marinelife/sponge_guide/

Echinodermata (starfish, sea urchins, etc):

Echinoid directory (keys, gallery, etc)  - http://www.nhm.ac.uk/research-curation/research/projects/echinoid-directory/

The natural history of the two British species of Asterina (cushion-stars) - http://www.field-studies-council.org/fieldstudies/documents/vol5.5_160.pdf

Tardigrada (tardigrades - water-bears or moss-pigs):

Excellent guide - http://www.tardigrades.com/

Plants, plant allies & species which manipulate plants (galls & leaf miners):

Botanical Society of the British Isles' (BSBI) plant identifier - http://www.botanicalkeys.co.uk/flora/

Water plants:

Kent BSBI's pondweed key - http://www.bsbi.org.uk/KBRG_Newsletter_5_2012.pdf

OPAL duckweed guide - http://www.opalexplorenature.org/sites/default/files/7/file/Duckweed-guide-FINAL.pdf

Guide to some common seaweeds - http://www.opalexplorenature.org/sites/default/files/7/file/Seaweed-Search-Guide.pdf

Jeremy Bigg's duckweed guide - http://jeremybiggs.wordpress.com/2008/11/12/not-just-boring-boring-duckweed/

Checklist & atlas of the seaweeds of Britain & Ireland - http://www.brphycsoc.org/documents/ChkList%26%20Atlas.pdf

Trees:

OPAL key to the 54 tree & shrub species in the DEFRA hedge survey - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/treesdefra.1.1

OPAL key to the 22 tree species in the OPAL tree survey - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/treesopal.1.2

Woodland Trust's guide to British trees - http://www.british-trees.com/index.htm

Naturespot trees, shrubs, climbers gallery - http://www.naturespot.org.uk/taxonomy/term/19655

Flowering plants:

OPAL key to the Hieraciums, section Asteria (Northern Hawkweeds) - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/Hieracium_section_Alpestria_key.2.5

Guide to wild flowers - http://www.judywoods.dial.pipex.com/British%20Wild%20Flowers.html

Guide to the flowering plants of Northern Ireland - http://www.habitas.org.uk/flora/splist.asp

Photo guide to the orchids of Europe - http://www.habitas.org.uk/europeanorchids/

Flora of the garden plants of Northern Ireland - http://www.habitas.org.uk/gardenflora/

David Fenwick's photo flora - http://www.aphotoflora.com

Wild flower finder - http://wildflowerfinder.org.uk/

Illustrated guide to tillage weeds - http://www.teagasc.ie/publications/2010/55/55_Guide_to_Identifying_Tillage_Weeds.pdf

Photo gallery of British plant species - http://www.amanita-photolibrary.co.uk/photo_library/BI_plants/index.htm

BSBI species accounts  -http://sppaccounts.bsbi.org.uk/

Snowdrop ID guide - http://www.bsbi.org.uk/Snowdrop_identification.pdf

Biological flora of the British Isles - http://www.britishecologicalsociety.org/journals_publications/journalofecology/biologicalflora.php#s

ID of daffodil cultivars - http://www.thedaffodilsite.co.uk/

Irish wildflowers - http://www.irishwildflowers.ie/index.html

Naturespot trees, shrubs, climbers gallery - http://www.naturespot.org.uk/taxonomy/term/19655

Naturespot flower gallery - http://www.naturespot.org.uk/taxonomy/term/19596

Grasses, rushes and sedges:

Naturespot grasses, rushes, sedges gallery - http://www.naturespot.org.uk/taxonomy/term/19680

Bryophytes (Mosses and liverworts):

British Bryological Society's field guide to mosses and liverworts - http://www.bbsfieldguide.org.uk/

BBS's guide to common mosses & liverworts of towns & gardens - 1: http://rbg-web2.rbge.org.uk/bbs/Learning/MALOTAG%2B1.pdf and 2: http://rbg-web2.rbge.org.uk/bbs/Learning/MALOTAG%2B2.pdf

ITE's Handbook of European Sphagna (Daniels & Eddy, 1985) - http://nora.nerc.ac.uk/5242/1/Handbook_Euro_Sphagna.pdf

The Sphagna of Norway (in Norwegian, with keys & plates) - http://ntnu.diva-portal.org/smash/record.jsf?pid=diva2%3A123377

British Bryological Society page (includes guides to difficult species pairs, etc) - http://www.britishbryologicalsociety.org.uk/

Sharon Pilkington's introductory guides to bryophytes - http://rbg-web2.rbge.org.uk/bbs/Learning/beginners_corner.htm

Naturespot mosses and liverworts gallery - http://www.naturespot.org.uk/taxonomy/term/19696

Ferns:

Ferns in Britain & Ireland - http://www.ferns.rogergolding.co.uk/index.html

British Pteridological Society website (includes BSBI Fern crib) - http://www.nhm.ac.uk/hosted_sites/bps/index.htm

Ferns identifier for the British Isles - http://fernid.info/

Naturespot ferns and horsetails gallery - http://www.naturespot.org.uk/taxonomy/term/21510

Diatoms:

Diatoms of North America - http://researcharchive.calacademy.org/research/diatoms/genera/

Freshwater diatoms of Western Europe - http://www.diatomloir.eu/Diatodouces/freshwater.html

Environment Agency diatom manual and key - http://craticula.ncl.ac.uk/EADiatomKey/html/manual.pdf

ADIAC diatom gallery - http://rbg-web2.rbge.org.uk/ADIAC/adiac.html

European diatom database - http://craticula.ncl.ac.uk/Eddi/jsp/

The amateur diatomist - http://www.diatoms.co.uk/ad/index.htm

Lichens:

OPAL key to common lichen genera on trees - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/simple-lichen.0.6

OPAL guide to common lichen genera - http://www.opalexplorenature.org/sites/default/files/7/file/OPAL-Air-Chart-web.pdf

OPAL key to lichen species on trees - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/lichen.1.5

OPAL key to some commoner crustose (flat, encrusting) lichen species on trees - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/lichen-crustose.1.0

OPAL key to some commoner foliose (dangly) lichen species on trees - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/lichen-foliose.1.0

OPAL key to some commoner fruiticose (stalked) lichen species on trees - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/lichen-fruticose.1.0

OPAL key to lichens on orchard trees - http://www.ispot.org.uk/webkeys/keyintroduction.jsp?selectedKey=webkeys/orchard-lichen-full.0.8

Lichens of Ireland (inc photos, glossary) - http://www.habitas.org.uk/lichenireland/splist.asp

David Fenwick's photo guide to fungi, lichens & slime moulds - http://www.aphotofungi.com/

Key to common tree lichens - http://dbiodbs.units.it/carso/chiavi_pub21?sc=351

Alan Silverside's lichen page - http://www.lichens.lastdragon.org/index.html

British Lichen Society - http://www.britishlichens.co.uk/index.html

Bedfordshire Natural History Society's Lichen Challenge page - http://www.bnhs.co.uk/focuson/lichen-challenge/html/index.htm

British lichen society - http://www.thebls.org.uk/

Chemical tests for lichen ID - http://www.thebls.org.uk/identification/chemical-tests

Irish lichens - http://www.irishlichens.ie/index.html

Naturespot lichen gallery - http://www.naturespot.org.uk/taxonomy/term/19757

Fungi (mushrooms, toadstools, fungal diseases of plants and animals):

Mushrooms - http://www.rogersmushrooms.com/gallery/chooser.asp

Pear rust Gymnosporangium sabinae) - http://sylva.org.uk/treewatch/pearRust

Oak powdery mildew (Erysiphe alphitoides) - http://sylva.org.uk/treewatch/powderyMildew

David Fenwick's photo guide to fungi, lichens & slime moulds - http://www.aphotofungi.com/

Photo guide to fungi & (some) slime moulds - http://www.amanita-photolibrary.co.uk/photo_library/BI_fungi/index.htm

British Mycological Society's downloadable fungus keys - http://www.britmycolsoc.org.uk/library/keys/

Leafspot fungi gallery (French) - https://picasaweb.google.com/108675098872555540610/ANAMORPHESMYCOSPHAERELLALES37#

Leafspot gallery (Danish) - http://www.plantesygdomme.dk/bladpletsygdomme.htm

Mycokey (Danish) - http://www.mycokey.com/

Photo guide to fungi - http://www.mushrooms.org.uk/

Wild About Britain's microfungi (fungi <5mm) page - http://www.wildaboutbritain.co.uk/forums/fungi-forums/66505-micro-fungi.html

Waxcap key - http://www.aber.ac.uk/waxcap/what/key-main.shtml

Mushroom Observer - http://mushroomobserver.org/?_js=on&_new=true

Association of British Fungi Groups' occurrence database - http://cate.abfg.org/

Mike Walton's fungi pages, inc digitisations of Victorian fungi books - http://www.mikewalton.org.uk/index.htm

Naturespot fungus gallery - http://www.naturespot.org.uk/taxonomy/term/19708

Key to fungi on dung - www.britmycolsoc.org.uk/index.php/download_file/view/466/‎

Myxomycetes (slime moulds):

Natural history of slime moulds - http://www.field-studies-council.org/fieldstudies/documents/vol4.3_111.pdf

David Fenwick's photo guide to fungi, lichens & slime moulds - http://www.aphotofungi.com/

Photo guide to fungi & (some) slime moulds - http://www.amanita-photolibrary.co.uk/photo_library/BI_fungi/index.htm

Plant growths/alterations:

Galls (growths on plants caused mainly by insects):

British plant gall society (inc gallery) - http://www.british-galls.org.uk/

Galls on Aspen - http://www.treesforlife.org.uk/tfl.aspen_galls.html

Images & discussion of Cynipidae - http://hedgerowmobile.com/Cynipoidea.html

The natural history of spear-thistle heads - http://www.field-studies-council.org/fieldstudies/documents/vol2.5_58.pdf

RES out-of-print handbook on Cynipoidea. Key to families and subfamilies and Cynipinae (including galls) - http://www.royensoc.co.uk/sites/default/files/Vol08_Part01a.pdf

Flickr gall group - http://www.flickr.com/groups/cecidology/

Photo gallery of galls - http://www.hainaultforest.co.uk/5UK%20Galls.htm

Discussion & images of gall-causers - http://hedgerowmobile.com/parasitica.html

Insects of Robin's pincushion galls - http://www.british-galls.org.uk/bedeguar-keys.doc

British plant gall society Yahoo group - http://uk.groups.yahoo.com/group/british_galls/

Oak galls in Britain 1, the galls - http://www.nhm.ac.uk/resources/research-curation/projects/chalcidoids/pdf_X/Willia2010.pdf

Oak galls in Britain 2, the insects -  http://www.nhm.ac.uk/resources/research-curation/projects/chalcidoids/pdf_X/Willia2010b.pdf

Naturespot gall gallery -  http://www.naturespot.org.uk/taxonomy/term/19701

Leaf mines:

British Leafminers: http://www.leafmines.co.uk/

Leafminers of Europe - http://www.bladmineerders.nl/

British leaf & stem mines - http://www.ukflymines.co.uk/index.php

Horse-chestnut leaf-miner survey - http://sylva.org.uk/treewatch/leafMiner

Horse-chestnut leaf miner survey (more detailed) - http://www.ourweboflife.org.uk/

Vertebrata:

Aves (birds):

BTO's Birdfacts - http://www.bto.org/about-birds/birdfacts

BTO's Bird ID - separation of similar species - http://www.bto.org/about-birds/bird-id

RSPB's bird identifier (key to common bird species) - http://www.rspb.org.uk/wildlife/birdidentifier/

RSPB's bird list - http://www.rspb.org.uk/wildlife/birdguide/name/a/

The Virtual Bird birdsong page - http://www.virtual-bird.com/birdsounds.htm

Massive collection of worldwide bird calls - http://www.xeno-canto.org/

Naturespot bird gallery - http://www.naturespot.org.uk/taxonomy/term/19206

Fish:

Freshwater fish - http://id.freshwaterlife.org/id_keys/key_player.htm?file=Fish

Mermaids' purses (shark & ray egg cases) - http://www.sharktrust.org/shared/downloads/great_eggcase_hunt/eggcase_id_key.pdf

Naturespot fish gallery - http://www.naturespot.org.uk/taxonomy/term/19273

Guide to the freshwater and marine fish of Britain (50Mb pdf) - http://www.fishactive.com/pdfs/Fish_Key_Guide.pdf

Herpetofauna (Reptiles & Amphibians):

Herpetofauna's online photo ID guide - http://www.herpetofauna.co.uk/identification.asp

Froglife's ID guide - http://www.froglife.org/documents/FROGLIFE_URBAN_TAILS.pdf

Reptiles:

ARC's reptile ID guide - http://www.arguk.org/download-document/86-reptile-identification-guide

ARC's guide to British snakes - http://www.arc-trust.org/downloads/Identifying_Britains_%20Snakes_FINAL.pdf

NARRS's reptile guide - http://www.narrs.org.uk/Documents/nrsdocuments/Reptile_identification_guide.pdf

Steve Falk's reptile Flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629207224086/

Richard Comont's reptile flickr set - http://www.flickr.com/photos/rcomont/sets/72157626223864164/

Naturespot reptile page - http://www.naturespot.org.uk/taxonomy/term/19267

Amphibians:

ARC's amphibian ID guide - http://www.arguk.org/download-document/85-amphibian-identification-guide

OPAL's guide to amphibians - http://www.arguk.org/download-document/65-opal-guide-to-amphibians

Newt eggs & larvae ID - http://www.arguk.org/download-document/11-newt-eggs-and-larvae-identification-guide

NARRS's amphibian ID guide - http://www.narrs.org.uk/Documents/nasdocuments/Amphibian_identification_guide.pdf

Steve Falk's amphibian flickr set - http://www.flickr.com/photos/63075200@N07/collections/72157629273458864/

Naturespot amphibian gallery - http://www.naturespot.org.uk/taxonomy/term/19263

Mammalia (mammals):

Terrestrial/semi-terrestrial mammals - http://www.mammal.org.uk/species_hub

Key to mammals of Northern Ireland - http://www.habitas.org.uk/nimars/index.htm?page=/nimars/mammalkey.htm

Steve Falk's Flickr mammal set - http://www.flickr.com/photos/63075200@N07/collections/72157629545925335/

Hebridean Whale and Dolphin Trust species page - http://www.whaledolphintrust.co.uk/species-what-is-a-cetacean.asp

Separating polecats and ferrets - http://www.vwt.org.uk/docs/polecat/polecats-and-ferrets-how-to-tell-them-apart.pdf?sfvrsn=6

Separating Wildcats from feral domestic cats - http://www.snh.org.uk/pdfs/publications/commissioned_reports/356.pdf

Naturespot mammal gallery - http://www.naturespot.org.uk/taxonomy/term/19249

Bats:

Guide & virtual key to bats - http://www.bio.bris.ac.uk/research/bats/britishbats/

ID bats in flight - http://www.discoverwildlife.com/british-wildlife/how-identify-british-bats-flight

ID of bats in the hand - http://www.southnottsbatgroup.org.uk/PDF/Identification_of_British_Bats.pdf

Key to bats of Europe - http://biocenosi.dipbsf.uninsubria.it/didattica/bat_key1.pdf

Warwickshire bat group - good ID guide, inc sight & sound - http://www.warksbats.co.uk/

Bat Conservation Trust - http://www.bats.org.uk/

Gilles San Martin's bat gallery (Belgium but much overlap) - http://www.flickr.com/photos/sanmartin/sets/72157607324817041/