Field guide to all the butterflies of the eastern United States. Includes additional information on unique field marks and flight patterns, ranges, seasonal abundance, and food plants.

"The life blood of Dr. Jeffrey Glassberg's new field guide are the superb photographs of living butterflies. Over 300 species of butterflies occurring in the eastern half of the United States and southeastern Canada are covered. The uniformly high quality of the photographs is instantly obvious....Glassberg and all those who helped him are to be commended on having produced a truly state of the art field guide."--News of the Lepidopterists' Society

Acknowledgements; Introduction; Color Plate Section; Species Accounts; Appendix; Bibliography; Organizations Concerned with Butterflies; Photographic Credits; Glossary