No. 7. 

 Anas obscnra. 



Prevailing color blackish brown, of lighter shade below ; 

 head and neck also lighter and more grayish in tone. Wing- 

 mark, or " speculum," purplish blue changing to green, and bor- 

 dered with black ; lining of wings white. 



Size very variable, but about that of species immediately 

 preceding, and of same general shape. 



Bill greenish yellow, with black nail at end. Legs orange 

 red, the webs dark. 



No. 7. 



Found chiefly in Eastern North America; " "West to Utah and 

 Texas ;" North to Labrador. 



DUSKY DUCK: DUSKY MALLARD: very generally known in 

 New England and Middle States as BLACK DUCK (see Nos. 28, 

 29). As we move westward, and farther south, we hear BLACK 

 MALLARD; and reaching South Carolina or Georgia, BLACK 

 ENGLISH DUCK, latter title continuing into Florida (though the 

 name Black Mallard is also heard in the far South). 

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