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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