54 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



FAMILY PHALACROCORACID^. 



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 eompof^ed of fourteen feathers. 



Fhalacrocoraxcarbo. Common Cormorant. Shag. 



See No. 79. 



Tail composed of twelve feathers. 



Phalarrocnrax diloplius^ and rnrrs. Double=crested Cormorant and Florida Cormorant. 



See Nos. 80 and 81 



The Mexican Cormorant, a smaller species, occasionally' occurs in tlu; Mississippi ^'allej'. 



* For directions for measiirenient, see page 9. 



