172 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



Caracara. 



Four outer primaries, emargiiiate, Ijut not decidedly notched; a part of inner web 

 of outer primaries, white, sliowiug uuinerou^? imperfect bars; tliig-hs, black, or 

 dark brown ; face, bare. 



"^ Audubon's Caracara. 



Polyhorus cherhoay. 

 See No. 297 



Tliree outer i)rimarles, notched; belly and thighs, not white. 



Swainson's Hawk. 



Buteo svminsoni. 

 See No. 277. 



Three outer primaries, notched; a part of inner wel) of outer primaries, white, 

 showing num(M-ous imperfect Ixirs ; belly and thighs, pure white; )>aek, dark 

 brown. 



Fish Hawk. 



Pandion haliaetus. 

 See No. 29S. 



Two outer primaries, notched; primaries, dark slaty Idue, sliowing greenisli 

 tinge when lield in tlie light; tail, long and forked; underparts and thighs, 

 white. 



Swallow=tailed Kite. 



Elanuides forficatus. 

 See No. 261. 



