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



Face, uot bare; upper surface of tail, grayisli brown, with numerous bars; 

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



Buteo sioainsoni. 

 See No. 277. 



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



white. 



Under surface of tail, wliitish at base ; one broad subtei-niinal band of dark brown, 

 tipped witli grayisli -wliite; upper inaudible elongated (see cut). Not recorded 

 north of Florida. 



Everglade Kite. 



Elanuidcs forjlcatus. 

 See No. 261. 



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

 rufous, with several bands of dark brown. 



Harsh Hawk. 



Circus hmlsonius. 

 See No. 265. 



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



not white. 



Upper surface of tail, bright rufous l)rown, with or without bauds (adult). 



Red=tailed Hawk. 



ButPO 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 tinged with pale rufous ; primaries, not tinged with 

 rufous (immature). Red^tailed Hawk. 



Bitten borealis. 

 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 linedltis. 



See No. 27.5. 



Upper surface of tail, dark brown, 1 tarred with white (adult). 



Red^shouldered Hawk. 



Buteo li)ii-(ttus, cold races. 

 See No. 275. 



Face, bare; basal portion of tail, white, barred witli black or d;irk brown; end 

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



Polyhorus cheritra>/. 

 See No. 297. 



