A field guide to eastern butterflies
By: Paul Opler ; illustrated by Vichai Malikul.
Series: The Peterson field guide series
Publisher: Houghton Mifflin
Published: 1998
Place of publication: Boston
Language: eng
Number of pages: 486
Subjects: Butterflies -- East (U.S.); Butterflies -- Canada, Eastern.; Butterflies -- Greenland.
Other titles: Eastern butterflies
Notes: Includes bibliographical references (p. 447-454) and index.
"Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute."