File:The Canadian bird book - illustrating in natural colors more than seven hundred north American birds, also several hundred photographs of their nests and eggs (1914) (14562285008).jpg - Wikimedia Commons
Book of North American Birds: An Illustrated Guide to More Than 600 Species: Editors of Reader's Digest: 9798889770053: : Books
The Nests and Eggs of Birds Of the United States., by Thomas G. Gentry
The Nests and Eggs of Birds Of the United States., by Thomas G. Gentry
Book Review: 'Birds of America,' by John James Audubon; 'Birds of the World,' by Elizabeth Gould - The New York Times
File:The bird book - illustrating in natural colors more than seven hundred North American birds; also several hundred photographs of their nests and eggs (1915) (14568933170).jpg - Wikimedia Commons
New Audubon Science: Two-Thirds of North American Birds at Risk of Extinction Due to Climate Change
The Most Notorious Goose in America
Studer and Jasper The Birds of North America 1878 color lithographs
File:The bird book - illustrating in natural colors more than seven hundred North American birds; also several hundred photographs of their nests and eggs (1915) (14563681619).jpg - Wikimedia Commons
