Sibley Birds East & Sibley Birds West: A Review
10,000 Birds
MAY 3, 2016
David Sibley notes in the Introduction that the order has been changed in some places so similar species could be placed next to each other for comparison purposes. Images show the bird in flight, both underside and upperside, and in juvenile and adult plumages– breeding and nonbreeding, and, where appropriate, male and female.
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