FAMILY FALCONIDA. — HAWKS, FALCONS, EAGLES, ETC. 169 
Adult. Swainson’s Hawks. Immature. 
Throat, white; breast, dull brown; thighs, barred rufous brown and white: 
three outer primaries emarginate or notched (adult) Swainson’s Hawk. 
Buteo swainsoni. 
See No. 277. 
Throat, buff or buff white; breast, heavily marked with dark brown; thighs, pale 
rufous or buff with or without bars; three outer primaries emarginate or notched 
(immature). Swainson’s Hawk. 
Buteo swainsoni. 
See No. 277. 
Throat and underparts finely barred with gray and dull white, the feathers with 
dark shafts; thighs, barred and mottled with gray and white; tail, 9.50 or over; 
wing, over 11.50 (adult). Goshawk. 
Accipiter atricapillus. 
See No. 268. 
Throat and underparts and thighs, white, or tawny white, streaked with dark 
brown; tail, strongly barred (immature). Goshawk. 
Accipiter atricapillus. 
See No, 268. 
