168 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 
Face, not bare; upper surface of tail, grayish brown, with numerous bars; 
three outer primaries emarginate or notched. Swainson’s Hawk. 
Buteo swainsoni. 
See No. 277. 
Section 3. Fourth primary, longest; upper tail coverts, 
white. 
Under surface of tail, whitish at base; one broad subterminal band of dark brown, 
tipped with grayish white; upper mandible elongated (see cut). Not recorded 
north of Florida. 
Everglade Kite. 
Elanoides forficatus. 
See No. 261. 
Upper mandible, more hawk-like (see cut); under surface of tail, white or pale 
rufous, with several bands of dark brown. 
Marsh Hawk. 
Circus hudsonius. 
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 borealis, and races. 
See No. 271. 
Upper surface of inner webs of outer tail feathers, barred with brown and white ; 
tnil feathers, more or less tinged with pale rufous; primaries, not tinged with 
rufous (immature). Red-tailed Hawk. 
Buteo borealis. 
See No. 271. 
Upper surface of inner web of outer tail feathers, barred with brown 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-shouldered 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. 
Polyborus cheriway. 
See No. 297. 
