28 KEY TO DUCKS, GEESE AND SWANS OF NOETH AMERICA. 



Speculum, purplish blue, not edged with white; head and throat, streaked; throat, 

 not buif, no black spot at base ol bill ; feet, olive (sometimes red) ; axillars, 

 white. Eastern IS'orth America. 



Black Duck. 



Dusky Duck. 



Anas obscura. 



See page 42. 



Speculum, purplish blue, not edged with white; head, pale brown; upper 

 throat, buff, not streaked ; bill, yellowish olive; nail of bill and spot at base, 

 black; feet, pale orange red; axillars, white. Florida species occasionally ob- 

 served on Gulf coast to Louisiana. 



Florida Black Duck. 

 Florida Dusky Duck. 

 Anas fulvigula. 



See page 43. 



Speculum, purplish blue, not edged with white ; Texas species ranging from 

 Texas north to Kansas. 



nottled Black Duck. 



Anas fulvigula maculosa. 

 See page 43. 



Section 4. Hind toe, with well defined membraneous lobe 

 or flap ; head with more or less white or grayish white ; 

 belly, black. 



General plumage, black ; speculum, white ; spot un- 

 der eye, white ; axillars, black ; bill, orange at base. 



White-winged Scoter. 

 White-winged Coot. 



Oidemia deglandi (male). 

 See page 75. 



Oidemia deglandi. 



General plumage, black ; head, black, with patch of white on crown and nape; 

 no white on wing ; axillars, black; bill, orange, black, and white. 



Surf Scoter. 

 Skunk-head Coot'. 



Oidemia perspicillata (male). 

 See page 77. 



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



white; axillars, white; bill, culmen, divided and rounded at base. (See cut of 



bill.) 



American Eider Duck. 



Somateria dresseri (male). 

 See page 69. 



