Mr Barry Henwood & Dr Phil Sterling 
Field Guide to the Caterpillars of Great Britain and Ireland [PDF ebook] 

”A much-needed guide – you can”t truly understand a moth or a butterfly without first getting to know the caterpillar.” – Nick Baker
This beautifully illustrated field guide covers caterpillars of the moth and butterfly species that are most likely to be encountered in the British Isles. The comprehensive introduction covers how to study caterpillars and provides a window into their diverse natural histories, while the species accounts cover status, field characters, similar species, habitat, foodplant and field notes, and are accompanied with up-to-date distribution maps.