ID sites and keys

Mulitiple keys
Web ID resources index
OPAL ID page
iSpot Keys index

Amphibians
http://www.opalexplorenature.org/sites/default/files/7/file/Amphibian-guide-FINAL.pdf

Barnacles
https://www.flickr.com/photos/56388191@N08/collections/72157633613346690/

Bats
http://www.durhambats.org.uk/bat_calls.htm
Bat sound key

Beetles
The Coleopterist
Dissecting Staphs instructions
Simple Key to beetle families 
Mike's Beetle Keys
Mark Telfer Beetles
Ladybird survey and info sheets
Mark Telfer Click Beetle key
Mark Telfer Chrysomelidae comments
Soldier Beetle Key 1
Soldier Beetle Key 2
Dytiscidae gallery
German site with keys
Martin Harvey's Coleoptera links
Mark Gurney's pictorial beetle families
Watford Coleoptera Group
Udo Schmidt
Ground Beetles of Ireland

Bryophytes
BBS Field Guide online pages
iSpot woodland Moss key

Bugs
Mike' Insect Keys
British Bugs
Bug Guide
http://www.kendalluk.com/

Pond skater key

Bumble-bee ID
NHM Bumblebee Key
http://bumblebeeconservation.org/about-bees/identification/common-bumblebees/

Caddisflies
http://delta-intkey.com/britin/tri/ident.htm

Centipedes
UK Centipede Checklist

Diptera
AIDGAP - Unwin key to family
Dipterist's Forum
Hoverfly Recording Scheme
Interactive fly glossary - superb
Tachinid recording scheme
Mosch diptera genus key
Scathophagia recording scheme
Cranefly recording scheme
Cranefly keys : search "stubbs kramer" 
Pipunculidae Euro genus key
Sarcophaga pages
Sarcophaga images

Dragonflies
British Dragonfly Soc ID guide
http://www.ghmahoney.org.uk/dragonfly/dfly_key.htm

Ferns
http://fernid.info/

Fungi
Roger's Mushrooms - great simple key
Index of Keys from Scottish Fungus Group
http://www.first-nature.com/fungi/index.php
http://www.aber.ac.uk/waxcap/
Henderson RustGuide

Hymenoptera
Social Wasps
Sawflies


Lichen
Short Key
Long key - 71 species
Photies

Millipedes
British Myriopod and Isopod Group
Millipede key

Molluscs
http://www.conchsoc.org/aids_to_id/idbase.php
http://idtools.org/id/mollusc/dissection.php

Orthoptera
http://www.wildlifebcn.org/sites/bcnp.live.wt.precedenthost.co.uk/files/files/Orthoptera%20keys%202007_1.pdf

Plants
BSBI Plant cribs

Spiders/Arachnids
Spiders of Europe
Online Linyphiidae key
Harvestmen
Ticks
http://harvestmen.tombio.uk/

Trees
BNH Tree Guide

Wildflowers
Wildflower Soc

Woodlice
http://www.nhm.ac.uk/woodlice/key.html