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ORNITHOLOGY BLOG PICK:
All About Birds
Avibase World Bird Database
An extensive database information system about all birds of the world, including information on distribution, taxonomy, and synonyms of species and subspecies. This site is hosted by Bird Studies Canada, the Canadian co-partner of Birdlife International.
Checklist of North & Middle American Birds
The official source on the taxonomy of birds found in North and Middle America. This list is produced by the North American Classification Committee (NACC), an official committee of the American Ornithological Society (AOS).
Checklist of South American Birds
The official source on the taxonomy of birds found in South America. This list is produced by the South American Classification Committee (SACC), an official committee of the American Ornithological Society (AOS).
Clements World Checklist
The Clements Checklist of Birds of the World, managed by the Cornell Laboratory of Ornithology. The online version incorporates changes since publication of the Sixth Edition in 2007.