52763, ♂. ½
Buteo zonocercus (52763).
58505, ♀. ¼
Buteo swainsoni (58505).
The species of this genus are very numerous, especially within the tropics, and are found all over the world, except in Australia. About thirty nominal species are known, of which about fifteen distinct species, not including geographical races, belong to America. A single species, B. solitarius (Pandion solitarius, Peale), (Gray’s Hand List, I, 15, No. 136,) belongs to the Sandwich Islands. The genus seems to be wanting in the Australian and East Indian regions.
The following species and races belong to the North American fauna.