102 HAWKS. 



e. Gray Falcons. Gennaia. 



Eather large hawks very pale without any conspicuous 

 markings. 



1. PRAIRIE FALCON, G. mexicanus. 18.00; grayish- 

 brown above, each feather margined with lighter and indis- 

 tinctly barred with lighter; band on back of head and be- 

 neath, white heavily streaked with brown; secondaries, with 

 lighter spots on outer webs. Western U. S. from the eastern 

 border of the Plains to the Pacific south into Mexico; casual 

 in 111. 

 C. SHOKT-WINGED HAWKS. Aceipitridae. 



Hawks of varying size with short, rounded wings and 

 long tails, fig. 198, which seldom sail in circles but move with 

 an irregular flight, alternately flapping and sailing ; legs, long. 

 Nests in trees; eggs 4, usually whitish, sometimes spotted. 



a. Short- wing^ed Hawks. Accipiter. 



Characters as above. 



1. SHARP-SHINNED HAWK, A. VELOX. Male, 11.00; 

 female, 13.00; tail, square, fig. 197; slaty-brown above, white 

 spots on scapularies, four dusky bands on tail, inner webs of 

 wing feathers barred with white; beneath, pale yellowish- 

 rafous banded with white and narrowly streaked with dusky. 

 Breeds throughout N. A. south to Panama; winters from the 

 Middle States southward, rarely as far north as Mass. Goes 

 south in Oct., north in April. Breeds in May. Common. 

 Eggs, heavily spotted. 



2. COOPER'S HAWK, A. cooperii. Male, 17.00; fe- 

 male, 19.00 ; differs from 1 in having the tail more rounded 

 and the legs and middle toe shorter, fig. 198*. Range and time 

 of migration similar to 1. Eggs, seldom spotted, never heav- 



3. AMERICAN GOSHAWK, A. atricapillus. Male, 

 21.00; female, 23.00; bluish above; top of head, and broad 

 band on its sides, black ; white spots on occiput ; three dusky 

 tail bands ; mixed white and bluish beneath mostly in bands 

 narrowly lined with dusky, fig. 398. Young, brown above, 



