The only field guide to cover all North American butterfly species, this monumental work is also a complete natural history, fully describing the biological and ecological world of butterflies in general. It is without question the most important book on butterflies in several decades, and the most complete treatment of a major butterfly faun ever published. The book is written at several levels of detail, most of it accessible to anyone, and employs the minimum of technical terms necessary for ensuring scientific accuracy. Extensive introductory material-a book in itself-stresses butterfly...