Butterflies of Britain & Europe (collins Field Guide) by Richard Lewington

This is the one compact, portable, and user-friendly field guide the novice or experienced birder needs to identify birds in the field in the diverse habitats found in Costa Rica.

Britain's Butterflies is a comprehensive and beautifully designed photographic field guide to the butterflies of Britain and Ireland. Containing hundreds of stunning colour photographs, this revised and updated edition provides the latest information on every species ever recorded. It covers in detail the identification of all 59 butterfly species that breed regularly, as well as four former breeders, 10 rare migrants and one species of unknown status. The easy-to-use format will enable butterfly-watchers―beginners or experts―to identify any species they encounter.