David Newland, a lifelong butterfly enthusiast, is the author of Discover Butterflies in Britain and the coauthor of Britain's Day-flying Moths (both WILDGuides). Robert Still, the cofounder of WILDGuides, is an ecologist and graphic artist, and has designed more than thirty of its titles. Andy Swash, the managing director of WILDGuides, is an ecologist and wildlife photographer. Swash and Still are coauthors of a number of books, including Britain's Day-flying Moths, Britain's Habitats and Britain's Mammals (all WILDGuides). David Tomlinson is a freelance writer on wildlife and the countryside and a longtime butterfly enthusiast.