KEY TO DUCKS, GEESE AND SWANS OF NORTH AMERICA. 



25 



Head, neck, and upper breast, dull cinnamon brown, palest on throat; lower 

 back, dull browu, barred with flue, wavy, white lines ; easily distinguished by 

 shape of bill. See cut. 



Canvas-back Duck. 



Aythya vallisneria {female) . 

 See page 54. 



Head, reddish brown; crown, not blackish; breast, 

 bliick; lower back, grayish, finely lined with black; 

 bill very different from that of Canvas-back. See 

 cut. 



Red-headed Duck. 

 Aythya americana (male) . 

 See page 53. 

 Aythya americana.' 



Section 6. Hind toe with well defined membraneous lobe 

 or flap ; belly, not white ; more or less white or grayish 

 white on head. 



General plumage, black ; a patch of white on front 

 of crown and nape ; bill, large, marked with orange, 

 red, black, and white; no white on wings. 



Surf Scoter. 

 Skunk Head Coot. 

 Oidemia perspicillata (male). 

 See page 77. 



General plumage, brown ; top of head and wings, dark ; a spot of dull white at 

 base of bill and behind eye ; no white on wings. 



Surf Scoter. 

 Skunk-head Coot. 



Oidemia perspicillata (female). 

 See page 77. 



Top and sides of head, white ; • patch of greenish in front of eye ; throat, black ; 

 all wing coverts, white. 



Stellers' Diick. 

 Stellers' Eider. 



Enic.onetta stelleri (male) . 

 See page 73. 



A large, silvery white patch enclosing the eye, narrowly bordered with black ; rest 

 of head, pale olive or grayish olive ; throat, white. 



Spectacled Eider. 



Arctonetta fisheri (mrde). 

 See page 72. 



