Natural History Museum Identify Nature
iSpot! Learn more about wildlife, share your observations with a friendly community and get help identifying what you have seen.
Birds
Bird song identifier / recordings www.xeno-canto.org plus code to embed the recording in your blog posts.
Mammals
Mammal fact sheets from The mammal society
Wild Flower Identification
Flower guide A colour-coded guide to the 65 species in the Plant Life Common Plant Survey (pdf)
Identify wild flowers – Botanical Society of the British Isles
British wild flowers photographic collection by John Somerville and other photographers
Wild Flower Guide from PlantLife (pdf)
Lichen Identification
British Lichens Fantastic site for identification go to Picture Index
Insects and Spiders
Steven Falk has probably the best online insect photographic collection www.flickr.com/photos/63075200@N07/collections
BioImages The virtual field-guide (UK)
Not the most user friendly but very comprehensive and a fantastic resource.
Ladybird Identification Sheet (pdf)
Butterflies
Moths
Bumblebees
Bumblebee Conservation Trust Bumblebee identification
iPhone and iPod touch apps,
Chirp! Bird Songs of Britain and Europe
Collins British Wildlife Photoguide
Isoperla Apps for Tree identification, Bird identification and Bird Song identification plus Orchid and amphibian identification.