bs 
Or 
os 
KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 
Group 3. Wing, over 7.50 inches long. 
Tail, pointed and rather long; under tail coverts, white. 
Passenger Pigcon. 
Ectopistes migratorius. 
See No. 251. 
Tail, square; under tail coverts, gray or bluish gray. . . 
White-crowned Pigeon. 
Columba leucocephala, 
See No. 250. 
FAMILY CATHARTID-AE. 
American Vultures. 
Plumage, black or dark brown; hind toe, short; claws, not sharp; 
head, bare in adult. 
Group |. Wing from 14 to 21 inches long. 
Section 1. Wing, less than 17 inches long. 
Head aud foreneck, bare; skin of head, blackish; general plumage, black; 
primaries, hoary white beneath. 
Black Vulture. 
Carrion Crow. 
Catharista urubi. 
See No. 260. 
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