178 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



Wiug, always over 18.50; belly and thighs, never white ; ouly adult 1)ird3 have 

 the hood and tail, white. 



Bald Eagle. 



ILiliaetiiA leucocepluilus. 

 See No. 2S5. 



Section 3. Fourth primary, longest; tarsus, witliout 



featliers. 



Back, l)rown ; face, hare. 



Audubon's Caracara. 



Pohjborus cheriway. 

 See No. 297. 



Section 4. Fourth primary, longest; tarsus, partly (not 



entirely) feathered. 



Tail, rufous hrown (adult) ; tail, whitish or grayish, with numerous lirown hars 

 (immature). 



Red=tailed Hawk. 



Bnteo borealis, and races. 

 See No. 271. 



General plumage, dark sooty brown, sometimes with pale underparts, more or 

 less streaked and spotted. 



Harlan's Hawk. 

 .r Butpo horealis harlani. 



See No. 274. 

 Wing, alw.a}'S over IS. 50; only adults h.ive head and tail white. 



Bald Eagle. 

 Haliaetns Icucocephalus. 

 See No. 285. 



Section 5. Fourth primary, longest; tarsus, entirely 



feathered. 



Thighs, tawny, more or less streaked or barred. American Rough=legged Hawk. 



Archibuteo lugopns sancti-johannis. 

 See No. 281. 



General plumage, sooty brown or black (black plumage). 



American Rough^legged Hawk. 



Archibuteo hKjopns sancti-johannis. 

 See No. 281. 



Thighs, tinged witli deep rufous with numerous bars. 



Ferruginous Rough^Iegged Hawk. 



Arch lb iiteo femifjineus. 

 See No. 282. 



