The Four Different Checklists of Birds of the World — SANTA MONICA BAY AUDUBON SOCIETY BLOG

You may be surprised to learn that there are not one, but four different checklists of all the birds in the world. As you will read below, out of a current total 11,524 extant and recently extinct species, the four lists agree on 9,968 (86.5%) of them, leaving 1556 species considered by some but not […]

via The Four Different Checklists of Birds of the World — SANTA MONICA BAY AUDUBON SOCIETY BLOG

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