158 KEY TO THE BIKDS OF EASTERN NORTH AMERICA. 



Group 3. Wing, over 7.50 inches long. 



Tail, pointed niid rather loii£c; under tail coverts, white. 



Passenger Pigeon. 



Ectopistes miyratorit(y. 



See No. 251. 



Tail, square; uuder tail coverts, grav or bluish gray. 



White-crowned Pigeon. 



Columba leucocephala. 



See No. 250. 



FAMILY CATHARTID>e. 



American Vultures. 



Plumage, black or dark brown ; hind toe, short ; claws, not sharp ; 

 head, bare in adult. 



Group 1. Wing from 14 to 21 inches long. 

 Section 1. Wing, less than 17 inches long. 



Head and foreiieek, bare; skin of head, blackish; general plumage, black; 

 priinai-ies, hoary white beneath. 



Black Vulture. 



Carrion Crow. 



CathariMa iir-uhn. 



See No. 260. 



