FAMILY ANATIDA. — DUCKS, GEESE, AND SWANS. 79 
Top of head, black, divided on crown; more or less green on head; throat, white; 
axillars, white; culmen, divided and pointed at base (male). (See cut of bill.) 
Somateria borea’is. Greenland Eider Duck. 
See No. 115. 
Top of head, slate color; cheeks, greenis)i; throat, white, with large, black, V-shaped 
mark (male). Somateria spectabilis. King Eider Duck. 
See No. 117. 
Section 2. Hind toe, with well defined membraneous lobe 
or flap; no white on head; belly, black. 
General plumage, black ; axillars, black; no white on wing; 
bill, orange at base; feathers on bill, more than one half inch 
from nostril (male). 
Oidemia americana. American Scoter. 
Black Coot. 
Butter=bill Coot. 
See No. 118. 
Section 3. Hind toe, with well defined membraneous lobe 
or flap; head, marked with more or less white, or 
grayish white; belly, mottled brown, or grayish brown, 
or slaty. 
General plumage, brownish ; 10 white on wing; feathers / J 
on bill, more than one half inch from nostril (female and im- yy / 
mature). 
Oidemia americana. American Scoter. 
Butter-bill Coot, 
See No. 118. 
General plumage, grayish brown ; speculum, white ; feathers on bill, less than one 
half inch from nostril (female and immature). ; ‘ 
Oidemia deglandi. White-winged Scoter. White-winged Coot. 
See No. 120. 
General plumage, grayish brown; feathers extending on upper part of bill more than on 
the sides; no white on wing; feathers on bill, less than one half inch from nostril ( female). 
Oidemia perspicillata. Surf Scoter. Skunk-head Coot. 
See No. 121. 
