340 



phalacrocoracidjE : cormorants. 



DOUBLE-CRESTED CORMORANT. 



Phalacrocorax dilophus (Sw.) Nutt. 



Chars. Tail of twelve feathers. 

 Gular sac convex behind. 

 Plumage glossy greenish- 

 black ; feathers of the back 

 and wings coppery-gray, 

 black-shafted, black-edged ; 

 adult with curly black lat- 

 eral crests, and in the 

 breeding season other fil- 

 amentous white ones, over 

 the eyes and along the 

 sides of the neck ; white 

 flank-patch not observed in 

 the specimens examined, 

 but probably occurring ; 

 gular sac and lores orange. 

 Length, 30.00-33.00 inches; 

 wing, 12.00 or more ; tail, 

 6.00 or more ; bill along 

 gape, 3.50 ; tarsus a little 

 over 2.00. Young plain 

 dark brown, paler or gray- 

 ish (even white on the 

 breast) below, without head- 

 plumes. 



This is the Cormorant 

 most widely dififused in 

 North America, and one 

 which occurs in New 

 England under circum- 

 stances similar to those 

 under which the preceding species is found. 



Fig. 74, — Double-crested CoRMORAm*. 

 Natural size. 



