172 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



Caracara. 



Four outer primaries, eraarginate, 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 forficatus. 

 See No. 261. 



