Peterson Field Guide To Hummingbirds Flexi Cover

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Guide to Hummingbirds
by Sheri L. Williamson; edited by Roger Tory Peterson. 275 pages.
Peterson Field Guides
The Peterson Field Guides employ a unique identification system, which has been called "the greatest invention since binoculars." Each guide pinpoints key field marks for quick recognition and easy comparison of species. All guides are illustrated with drawings and photographs in color and black and white, and all provide up-to-date range information and the most useful descriptions you'll find anywhere. 4-1/2" x 7-1/4" standard format.