80 



KKY TO THK P.IUDS OF K ASTERN 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 wliiti- on winijs: 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 lirown or hl.uU: feathers on bill, less than one half inch from nostril ; 

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



Oidemia ijcrspicillata. Surf Scoter. Skunk=head Coot. 



See No. 121. 



A patch of white on the winj^s; hack and upper parts, dark brown; feathers on the base 

 ol hill, exteudin<; to witliiu one half inch of nostril (female). 



Oidemia <le<jl<nidi. White=winged Scoter. 



Sec Xo. rjo. 



hiead, tawny, -^ireaUed wiih lirown : axillars, white, or grayish white ; tliroai. streaked; 

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

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



Svmateria dresseri. American Eider Duck. 



See \o. IK). 



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

 streaked; featiieis on hill, within one fourth inch from nostril ; decided difference in bill 



from prct-edimi species (f<'male). (^See cut.) Eastern Xortli America. 



SovuUeria borcalis. Northern Eider Duck. 



See No. 115. 



Head, tawny, streaked with biowu: a\illMr<, white, or grayish white; throat, not 

 etreakt .1 : feathers on bill, more than one fourth inch from nostril (fi male). 



tSuvialena .N^/t'(7f<!>///.s. King Eider Duck. 

 JSec No. 117. 



