80 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 
Section 4. Hind toe, with well defined membraneous lobe 
or flap; no white on head; belly, mottled brown, or 
grayish brown. 
General plumage, brownish; no white on wings; axillars, 
black; feathers on the bill, more than one half inch from 
nostril (female). 
Oidemia americana. American Scoter. 
Butter=bill Coot. 
Gray Coot. 
See No. 118. 
Head, dark brown or black; feathers on bill, less than one half inch from nostril; 
axillars, black; no white on wings (immature male). 
Oidemia perspicillata. Surf Scoter. Skunk-head Coot, 
see No. 121. 
A patch of white on the wings; back and upper parts, dark brown; feathers on the base 
of bill, extending to within one half inch of nostril (female). 
Oidemia deglandi. White-winged Scoter. 
See No. 120. 
Head, tawny, streaked with brown; axillars, white, or grayish white ; throat, streaked 5 
feathers on bill, within one fourth inch from nostril; decided difference in bill from 
next species (female). (See cut.) astern North America. 
Somateria dresseri. American Eider Duck. 
See No. 116. 
Head, tawny, streaked with brown; axillars, white, or grayish white; throat, 
strenked; feathers on bill, within one fourth inch from nostril; decided difference in bill 
from preceding species (female). (See cut.) Eastern North America. 
Somateria borealis. Northern Eider Duck. 
See No. 115. 
Head, tawny, streaked with brown; axillars, white, or grayish white; throat, not 
streaked; feathers on bill, more than one fourth inch from nostril (female). 
Somuteria spectabilis. King Eider Duck. 
See No. 117. 
