KEY TO DUCKS, GEESE AND SWANS OF NORTH AMERICA. 31 



Section 7. Hind toe with well defined membraneous lobe 

 or flap ; no white on head ; belly, mottled brown or 

 grayish brown. 



Qeneral plumage, brownish ; no white on wings ; 

 axillars, black; feathers on the bill, more than 

 one=half inch from nostril. 



American Scoter. 

 Butter-bill Coot. 

 Gray Coot. 



Oidemia americana (female). 

 See page 74. 



Head, dark brown or black; feathers on bill, less than one-half inch from 

 nostril ; axillars, black ; no white on wings (immature male). 



Surf Scoter. 

 Skunk=hea^ Coot. 



Oidemia perspicillata (young male). 

 See page 77. 



Head, tawny, streaked with brown; axillars, white or grayish white ; throat, 

 streaked; feathers on bill, within one=fourth inch from nostril; decided 

 difference in bill from next species. (See cut.) Eastern North America. 



American Eider Duck. 



Snmateria dresseri (female) . 

 See page 69. 



Head, tawny, streaked with brown; axillars, white or grayish white; throat, 

 streaked ; feathei-s on bill within one-fourth inch from nostril ; decided dif= 



ference in bill from preceding species. (See cut.) Eastern North America. 



Greenland Eider Duck. 



Somateria borealis {female) . 

 See page 68. 



Resembles the preceding species, but occurs in Western North America, Pacific 

 coast, and Great Slave Lake regions ; does not occur in Eastern North America. 

 (See cut of bill.) 



Pacific Eider Duck. 



Somateria V-nigra (female). 

 See page 70. 



Head, tawny, streaked with brown; axillars, white or grayish white ; throat, 

 not streaked; feathers on bill more than one-fourth inch from nostril. 



King Eider Duck. 



Somateria spectnbilis (female). 

 See page 71. 



