A Field Guide to the Birds on the Web
Links to pictures, sounds, and video of the birds of the world, systematically indexed.
American Ornithologists' Union Check-list of North American Birds
The official source on the taxonomy of birds found in North and Middle America, including adjacent islands. The full list of 2,023 bird species (with scientific and English names) is online in html, pdf, and dbf formats.
Avibase
An extensive database information system about all birds of the world, containing nearly 1 million records about 10,000 species and 22,000 subspecies of birds, including distribution information, taxonomy, and synonyms in several languages.
Bird Families of the World
Don Roberson's detailed guides to about half of the world's 202 bird families.
Bird Families of the World
Short descriptions and sounds of the world's bird families by Chris Butler.
Bird Hybrids Database
Worldwide database compiled from the ornithological literature of birds with two different species as parents. Includes complete references for each species combination. In English, French, and Spanish.
Bird Lists
Lists sorted by taxonomy, scientific names, or English names for the world, the ABA area, or the AOU area.
Birdhybrids
Mailing list for discussion of bird hybrids.
Birds of North America
Comprehensive reference series on North American birds, with information and sample profiles.
Birds of North American, Audubon's Watercolors
Fifty-one images of North American birds from watercolors done by John James Audubon. List can be browsed by common or scientific name.
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