Sibley Birds East & Sibley Birds West: A Review
10,000 Birds
MAY 3, 2016
Organization: The guides are organized taxonomically (by scientific group), according to the 17th edition of the American Ornithologists’ Union (AOU) Check-list of North American Birds , including changes through the 56th supplement, which came out in 2015. Knopf; March 2016, 464 pages. Knopf; March 2016, 504 pages.
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