1(58 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



Face, not bare; upper surface of tail, grayisli brown, witli numerous bars; 

 three outer primaries emargiaate or notched. Swainson's Hawk. 



Biiteo swainsdiii. 

 See No. 277. 



Section 3. Fourth primary, longest ; upper tail coverts, 



white. 



Under surface of tail, whitish at base; one broad subterniinal l)and of dark brown, 



tipped with grayish white; upper mandible elongated (see cut). Not recorded 



north of Florida. 



Everglade Kite. 



Elanoides forjicatus. 



See No. 261. 



Upper mandilde, more hawk-like (see cut) ; under surface of tail, white or pale 

 rufous, with several bands of dark brown. 



Harsh Hawk. 



Circus hudsoHuts. 

 See No. 265. 



Section 4. Fourth primary, longest; upper tail coverts, 



not white. 



Upper surface of tail, bright rufous brown, with or without bands (adult). 



Red^tailed Hawk. 



Buteo horcalis, and races. 

 See No. 271. 



Upper surface of inner webs of outer tail feathers, barred with brown and white ; 

 tail feathers, more or less tiuged with pale rufous; primaries, not tinged with 

 rufous (immature). Red-tailed Hawk. 



Buteo horealis. 

 See No. 271. 



Upper surface of inner web of outer tail feathers, barred with ])rown and white; 



tail feathers, more or less tinged with pale rufous; primaries, more or less 



tinged with rufous (immature). 



Red=shouldered Hawk. 



Buteo lineatus. 



See No. 275. 



Upper surface of tail, dark brown, barred with white (adult). 



Red=shouIdered Hawk. 



Buteo lineatus, and races. 

 See No. 275. 



Face, bare ; basal portion of tail, white, barred with black or dark brown ; end 

 of tail black; thighs, black or dark brown. Audubon's Caracara. 



Polyhorns cherivaij. 

 See No. 297. 



