212 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



Plumage, black; wing, under 11.50; tarsus, under 2.10; bill, under 1.80. 



Fish Crow. 



Corvus ossifrayus. 

 See No. 368. 



Group 6. Wing, over 15 inches long. 



Raven. 



General plumage, black. 



Raven. 



Corvus comx principalis. 

 See No. 365. 



