FAMILY ANATIDl*:. DUCKS, GEESE, AND SWANS. 



77 



Section 4. Hind toe, with well defined membraneous lobe 

 or flap; belly, not white; no white on head. 



Axillars, brown; secondaries, white, forming a white wing 

 patch; upper parts, dark brown; underparts, sometimes brown, 

 sometimes grayish (female). 



Oidemia derjlandi, White=winged Scoter. 

 White-winged Coot. 

 See No. 120. 



* Group 5. Wing, 10 to 14 inches long. 



Section 1. Hind toe, with well defined membraneous lobe 

 or flap; head, with more or less white, or grayish 

 white; belly, black. 



General plumage, black; speculum, white; spot under 

 eye, white; axillars, black; bill, orange at base (male). 



Oidemia deglandi. White=winged Scoter. 

 White-winged Coot. 



See No. 120. Oidemia deglandi. 



General plumage, black; head, black, with patch of white on crown and nape: no 

 white on wing ; axillars, black; bill, orange, black, and white (male). 



Oidemia per spicillata. Surf Scoter. Skunk=head Coot. 



See No. 121. 



Dresser's Eider Duck. 

 Somateria dresser! . 



Northern Eider Duck. 

 Somateria horealis. 



Top of head, black, divided on crown; more or less green on head ; throat, white; 

 axillars, white; bill, culmen, divided and rounded at base (male). (See cut of bill.) 



Somateria dresseri. American Eider Duck. 



See No. 116. 



* For directions for measurement, see page 9. 



