24 



KEY TO DUCKS, GEESE AND SWANS OF NORTH AMERICA. 



Top of head, brown ; sides of head, brownish white ; speculum, gray ; bill, 

 more than one and a quarter inches long. 



Red-head Duclc. 



Aythya americana (female) . 

 See page 53. 



Bill, not over 1.25 long; a patch of white or grayish white, on the head, 



including the eye ; no speculum ; under tail covert, white ; adult males have 

 the tail feathers long and pointed. 



Old Squaw. 



Long=tailed Duck. 



Olangula hyemalis. 

 See page 64. 



Section 5. Hind toe with well defined membraneous lobe or 

 flap ; belly, white, sometimes tinged on lower part with 

 dusky or gray; no white or grayish white on head. 



Aythya niarila nearotica. 



Head, black, glossed with green ; back, gi-ayish 

 white, finely lined with black; speculum, white. 



Greater Scaup Duck. 

 Blue°bill, Black-head. 



Aythya mania nearotica {male) . 

 See page 56. 



Head, cinnamon brown ; upper breast and back, ashy gray, not barred ; specu- 

 lum, white. Very similar to female Barrow's Golden Eye, but slightly 

 smaller, much more common than the next species on the Atlantic coast. 



American Qolden Eye. 

 Whistler. 



Qlauoionetta olangula americana (female) . 

 See page 59. 



Head, cinnamon brown; upper breast and back, ashy gray not barred; specu- 

 lum, white, very similar to preceding species, but slightly larger. 



Barrow's Golden Eye. 



Qlauoionetta islandica (female). 

 See page 60. 



Head, rufous brown; crown, blackish; breast, 



black; lower back, ashy white, finely lined with 



black; bill very different from that of Eed-head. 



See cut. 



Canvas-back Duck. 



Aythya vallisneria (male) . 



. ,, ,,. . See page 54. 



Aythya yallisuena. ^ ° 



