54 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



FAMILY PHALACROCORACIOC. 



Cormorants. 



Bill, hooked at tip, and less than twelve inches long ; 

 bare skin at base of bill and chin ; lores, bare ; toes, four, 

 all connected by webs. 



* Group 1. Wing, 11 to 15 inches long. 



Tail composed of fourteen feathers. 



Phalacrocorax carbo. Common Cormorant. Shag. 



See No. 79. 



Tail composed of twelve feathers. 



Phalacrocorax dilophus, and races. Double=crested Cormorant and Florida Cormorant. 



See Nos. 80 and 81 



The Mexican Cormorant, a smaller species, occasionally occurs in the Mississippi Valley. 



* For directions for measurement, see page 9. 



