Ducks 



163. American Scoter (Oidemia amertcana}. L. 19. 

 Feathers at base of bill not extending forward on sides 

 or top. Ad. rf . Wholly black; bill black, yellow at 

 base. Ad. $ Brownish above, lighter below; no 

 white on wing or on sides of head. Notes. A long 

 musical whistle. (Elliot.) 



Range. Northern North America; breeds from Labrador and Alas- 

 kan shores of Bering Sea northward; winters south to Virginia, Great 

 Lakes, Colorado, and California. 



166. S u rf Scoter ( Oidemta perspicillata) . L . 20. 

 Feathers extending forward on top of bill. Ad. tf. 

 Black, nape and crown white; bill orange, yellow, and 

 white, a round black patch on its sides. Ad. $. 

 Above black, throat and breast paler; belly whitish; 

 a whitish patch at base of bill. Yng. Similar but 

 with white patches on ears. 



Range. Northern North America; breeds from Newfoundland 

 northward; winters south to Virginia, Florida, Illinois, and Lower Cal- 

 ifornia. 



165. White-winged Scoter (Oidemia deglandi). 

 L. 22. A white patch on wing; feathers extending 

 forward along sides and top of bill nearly to nostrils. 

 Ad. cf. Black, a white spot about eye; bill orange, 

 black at base. Ad. ?. Dusky brown above; lighter 

 below. Yng. ^. Similar but sides and front of head 

 whitish. 



Range. Northern North America; breeds from Labrador and North 

 Dakota northward; winters south to Virginia, southern Illinois, and 

 Lower California. 



177. Black-bellied Tree Duck (pendrocygna au- 

 tumnalis). L. 22. Ads. Belly and tail coverts black; 

 fo+eback and breast gray; greater wing-coverts 

 whitish. Notes. A shrill whistle. (Elliot.) 



Range. Tropical America north to southern Texas. 



178. Fulvous Tree Duck (T)endrocygna fulva). 

 L. 22. Ads. Belly uniform rusty brown; upper tail 

 coverts white; a black streak on hindneck; no white in 

 wing. Notes. A squealing whistle. 



Range. Tropical America, north In summer to Texas, Louisiana, 

 Nevada and central California. "Casual in North Carolina and 

 Missouri." (A. O. U.) 



83 



763. 



