KEY TO DUCKS, GEESE AND SWANS OF NORTH AMERICA. 



I'D 



Dref^ner's Eider Duck. 

 Somateriii dresseri. 



Northern Eider Duck. 

 Somateria Ijorealis. 



Top of head, black, divitU'.d on crown; more or less green ou head; throat, 

 white; axillurs, white ; cuhneii, divideil and pointed at liase. (See cnt of l)ill.) 



Greenland Eider Duck. 



iSoiiintfria horenlis (male) . 

 See page G8. 



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

 with black, V-shaped mark. I'aeitic species does not occur ou Atlantic coast. 



Pacific Eider Duck. 



Somateria r-ni(ira (male). 

 See page 70. 



Top of head, slate color; cheeks, greeuisli; throat, white, with large, black, 

 V=shaped mark. 



King Eider Duck. 



Somateria upeetahilin (male). 

 See page 71. 



Section 5. Hind toe with well defined membraneous lobe 

 or flap ; no white on head ; belly, black. 



General plumage, black; axiUars, black; no white on 

 wing; bill, orange at liase: feathers on bill, more than 

 one-half inch from nostril. 



American Scoter. 

 Black Coot. 

 Butter-bill Coot. 

 Oidemia americana (male). 

 See page 74. 



