FSC Mayflies AIDGAP is a pictorial guide to British Ephemeroptera. It is an identification guide to both the adults and larvae (nymphs) of the 51 species of mayflies recorded in Britain and Ireland.
This is a field guide to live speciments of both adults and larvae (nymphs). Two pictorial keys (one to adults and one to larvae) take identitification to family level, leading to further illustrated keys to individual species.
Detailed individual species accounts follow. These include distribution maps, habitat requirements, conservation status and notes on how the species may be separated from similar species.