Audubon's Birds of America at the University of Pittsburgh: Presents a digitized version of the complete double elephant folio set of Audubon's Birds of America, accompanied by his Ornithological Biography
Audubon Catalog: The Musée de la Civilisation (Quebec) provides an electronic, searchable catalog of Audubon's Birds of America. (Click on the image labeled Page 001 to enter the catalog.)
Audubon House Gallery: Adjacent to the historic Audubon House & Tropical Gardens in Key West, Florida, this gallery features a unique collection of Audubon art. The website contains digital versions of the Birds of America and Quadrupeds of North America.
Internet Archive Collection of Audubon texts: A number of works by and about John James Audubon have been made available through the Internet Archive. These electronic full-text editions are freely available and viewable to anyone.
John James Audubon's Birds of America: Presented by the National Audubon Society, this site enumerates the birds featured in Birds of America according to ornithological family; as state birds; and as extinct birds.
National Gallery of Art, Birds of America: Presents selected plates from the Birds of America catalog
American Birding Association: Organization that specifically caters to recreational birders
American Ornithologists' Union: The oldest and largest organization devoted to the scientific study of birds.
Backyard Bird Sounds: Collection of bird calls and songs recorded by the Cornell Lab of Ornithology
Birding on the Net: Comprehensive webliography of birding sites, sorted by regions of the world
Birds of North America: Comprehensive site that provides information on each of the more than 700 species of birds in the United States and Canada. (Note: Full access to this site is limited to members of the University of Illinois community. A freely accessible preview version of the site is available here.)
Champaign County Audubon Society: Local chapter of the Audubon Society
Cornell Lab of Ornithology: Organization dedicated to interpreting and conserving the earth's biological diversity through research, education, and citizen science focused on birds.
eBird: A real-time, online program that allows professional and recreational birders to submit data from their birding observations
Learn Bird Songs: Resource for birders wishing to learn common bird songs and sounds
National Audubon Society Bird Links: A selection of links about birds and birding