170 



KEY TO THE BIRDS OF EASTERN MOUTH AMERICA. 



Group 5. Wing, 15 to 17 inches long. 



Section 1. Second primary, longest; only first primary, 

 emarginate, or notched. 



Duck Hawk. 



Length, under 19- primaries, dark brown, banded on inner web with pale rufous. 



Duck Hawk. 

 Falco peregrinus anatum. 



See No. 291. 

 Length, over 19 ; under tail coverts, white, without spots. 



White Qyrfalcon. 

 Falco islandus, and races. 

 See No. 286. 



Length, over 19 ; under tail coverts, marked with dusky or spotted. 



Gray Qyrfalcon. 



Falco rusticolns. 

 See No, 287. 



