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



Section 6. 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 ; no white on wiug ; 

 feathers on bill, more than one=half inch from 

 nostril (female and immature) . 



American Scoter. 

 Butter-bill Coot. 

 Oidemia americana (female). 

 Oidemia americana. ®^® P^S^ 74. 



General plumage, grayish brown ; speculum, white ; feathers on bill, less 

 than one-half inch from nostril (female and immature). 



White-winged Scoter. 

 White-winged Coot. 



Oidemia deglandi (female). 

 See page 75. 



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. 



Surf Scoter. 

 Skunk-head Coot. 

 Oidemia perspicillata (female). 

 See page 77. 



A large spectacle-like, silvery white patch enclosing the eye, narrowly bordered 

 with black. 



Spectacle Eider. 



Arctonetta fisheri {male). 

 See page 72. 



