National Audubon Society
National Audubon Society: Audubon's Birds of America
The original text and artwork from Birds of America by John James Audubon, an 1840 edition. Includes families of birds and an alphabetical listing of birds. A section of now-extinct birds and one of state birds have been added.
National Gallery of Art
National Gallery of Art: Selections From Audubon's the Birds of America
This National Gallery of Art site contains several very nice images from Audubon's "Birds of America" collection.
National Endowment for the Humanities
Neh: Picturing America: Audubon: American Flamingo [Pdf]
Analysis of a hand-colored engraving from Audubon's comprehensive natural science catalog, "Birds of America."