John Cassin

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John Cassin.
John Cassin.

John Cassin (September 6, 1813 - January 10, 1869) was an American ornithologist. He is considered to be one of the giants of American ornithology, describing 198 birds not previously mentioned by Alexander Wilson and John James Audubon.

The best known of Cassin's many publications are his Illustrations of the Birds of California, Texas, Oregon, British and Russian America (1853-56), and Birds of North America (1860), co-authored with Baird and Lawrence.