Peterson field guide to birds of Western North America
By: Roger Tory Peterson ; with contributions from Michael DiGiorgio .. . [et al.]
Contributors: DiGiorgio, Michael.; Peterson, Roger Tory, 1908-1996.
Edition: 4th ed.
Publisher: Houghton Mifflin Harcourt
Published: 2009
Place of publication: Boston
Language: eng
Number of pages: 493
ISBN-13: 9780547152707
Subjects: Birds -- West (U.S.) -- Identification; Birds -- Canada, Western -- Identification
Genres: Identification
Other titles: Field guide to birds of Western North America
Notes: Rev. ed. of: A field guide to Western birds. 3rd ed. 1990.

Includes index.