A field guide to western birds
Subtitle: a completely new guide to field marks of all species found in North America west of the 100th meridian and north of Mexico
By: text and illustrations by Roger Tory Peterson ; maps by Virginia Marie Peterson.
Contributors: Peterson, Virginia Marie, 1925-; National Audubon Society.; National Wildlife Federation.; Roger Tory Peterson Institute.
Edition: 3rd ed., completely rev. and enl.
Series: The Peterson field guide series -- no.2
Publisher: Houghton Mifflin
Published: 1990
Place of publication: Boston
Language: eng
Number of pages: 432
Subjects: Birds -- West (U.S.) -- Identification; Birds -- Canada, Western -- Identification
Notes: "Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute."

Includes bibliographical references (p. 416) and index.