FAMILY ANATID. — 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 deglandi. 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 3 axillars, black: bill, orange, black, and white (male). 
Oidemia perspicillata. Surf Scoter. Skunk-head Coot. 
See No. 121. 
Dresser’s Eider Duck. Northern Eider Dueck. 
Somateria dresseri. Somateria borealis. 
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, 
