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The AOU Checklist of North American Birds
is the official source for taxonomy of birds in North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
. It is published by the American Ornithologists' Union
The American Ornithologists' Union is an ornithological organization in the USA. Unlike the National Audubon Society, its members are primarily professional ornithologists rather than amateur birders...
. The North American Classification Committee (NACC) considers proposals related to classification and nomenclature, and produces the Checklist
and makes major revisions (editions
) and minor updates (supplements
). The 11th supplement to the seventh edition was released in July 2011.