Jan., 1909. Birds of Illinois and Wisconsin —Cory. 



51 



Family PHALACROCORACI Dv^. 



7 



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 ; tail feathers, stiff. 



Double-crested Cormorant, 



Mexican Cormorant. 



* GROUP 1. Wing, II to [5 inches long. 



Plumage, variable at different seasons; but wing, always over 11 



inches long. Phalacrocorax anritus, and races. 



Double-crested Cormorant and Florida Cormorant. 



See Nos. 32 and 32a. 



* GROUP 2. Wing, less than 10.50 inches long. 



Adult: With white line bordering the bare skin on throat; imma- 

 ture: showing throat pale, but white line not clearly defined. 



Phalacrocorax vigua niexicanus . 



Mexican Cormorant. 



See No. 



* For directions for measurement, see page 21. 



