M2 KEY TO THE BIRDS OF EASTERN NORTH AMERICA, 
Caracara. 
Four outer primaries, emarginate, but not decidedly notched; a part of inner web 
of outer primaries, white, showing numerous imperfect bars; thighs, black, or 
dark brown; face, bare. 
Audubon’s Caracara. 
Polyborus cheriway. 
See No. 297 
Three outer primaries, notched; belly and thighs, not white. 
Swainson’s Hawk. 
Buteo swainsoni. 
See No. 277. 
Three outer primaries, notched; a part of inner web of outer primaries, white, 
showing numerous imperfect bars: belly and thighs, pure white; back, dark 
brown. 
Fish Hawk. 
Pandion haliaetus. 
See No. 298. 
Two outer primaries, notched; primaries, dark slaty blue, showing greenish 
tinge when held in the light; tail, long and forked; underparts and thighs, 
white. 
Swallow-tailed Kite. 
Elanoides foryicatus. 
See No. 261. 
