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 win£i;s; 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 (innnatine male). 



Oidemia perspicillata. Surf Scoter. Skunk=head Coot. 



See No. 121. 



A patch of white on the wings; back and upper parts, dark brown; featliers on the base 

 of bill, extending- to within one half inch of nostril (female). 



Oidemia dojihtmli. White=winged Scoter. 

 See No. 120. 



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

 feathers on bill, within one fourth inch from nostril ; decided difference in bill from 

 next species (female). (See cut.) Eastern North America. 



Somateria dresseri. American Eider Duck. 



See No. 116. 



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

 streaked; feathers on bill, witliin one fourth inch from nostril ; decided difference in bill 



from preceding species (female). (See cut.) Eastern North America. 



Somateria horealis. 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). 



t^omatena sjjectabilis. King Eider Duck. 



See No. 117. 



