allen] COLOR KEY TO DUCKS 179 



Male Ring-necked Dock. 

 EE. Bill bluish. 



1\ Head greenish. 



Male Greater Scaup. 

 FF. Head purplish. 



Male Lesser Scaup. 

 CC. Flanks brownish like back. 

 D. White at base of bill. 

 E. Bill bluish crossed by dark band. 



Female Ring-necked Duck. 

 EE. Bill bluish, without band. 



F. Bird larger, wing over eight inches in length. 

 Female Greater Scaup. 

 FF. Bird smaller, wing less than eight inches in length. 

 Female Lesser Scaup. 

 DD. No white at base of bill. 



Female Mallard. 

 BBB. White under wings, bird uniformly dark. 



C. Bill yellowish, Male Black Duck. 

 CC. Bill greenish, Female Black Duck. 

 AA. Birds with conspicuous light blue in wing. 



B. Broad white band nearly encircling neck, bill broad. 



Male Shoveller. 

 BB. White bar in front of eye, bill normal. 

 Male Blue-winged Teal. 

 BBB. Plumage uniformly brownish, except for wing marks. 

 C. Bill broad. Female Shoveller. 

 CC. Bill normal. Female Blue-winged Teal. 

 AAA. No conspicuous marks in wings but not uniformly dark. 

 B. Tail long and pointed. 



C. White of breast extending along sides of neck and 



behind cheeks. Male Pintail. 

 CC. No white on neck. Female Pintail. 

 BB. Tail normal. 



C. Wings and back grey. 



D. Head reddish. Male Redhead. 

 DD. Head brownish. Female Redhead. 

 DDD. Head and neck cinnamon, profile sloping. 



