FAMILY AN ATIDJK. DUCKS, GEESE, AND SWANS. 73 



Speculum, gray ; head and neck, brownish; chin and anterior portion of lores, brownish 

 white or whitish (female) ; resembles female Red-head, but is smaller. 



Aythya collari*. Ring-necked Duck. 

 See No. 107. 



A patch of white or grayish white on the head, including the eye; no speculum; 



under tail coverts, white; adult males have the tail feathers long and pointed. 



Clanyula hyemalis. Old Squaw. Long tailed Duck. 



See No. 111. 



Section 2. Belly, white, sometimes tinged on lower part 

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



Head, brown; a distinct wing band of white (female). 



Glaucionetta clangula americana. Golden Eye. 

 See No. 108. 



Glaucionetta elangula 

 americana. 



Head, black, glossed with green; speculum, white; back, grayish white, finely 

 lined with black (male). 



Aythya marila. Greater Scaup Duck, Blue bill or Black-head. 



See No. 105. 



Head, black, glossed with purple, finely lined with black; speculum, white; back, 

 grayish white, smaller than the preceding species, but resembles it closely (male). 



Aythya affinis. Lesser Scaup Duck. Blue bill or Black head. 



See No. 106. 



Head, black, with violet or bluish gloss, a spot of white on the chin; speculum, 

 gray; back, dull black (male). Aythya coUaris. Ring-necked Duck. 



See No. 107. 



Section 3. Belly, not white. 



Plumage, variously marked with white, slate-color, and chestnut; speculum, bluish; top 

 of head and wing coverts, not white (male). Histrionicus histrionicns. Harlequin Duck. 



See No. 112. 



Top of head and wing coverts, not white ; plumage, dull brown, mottled on the under- 

 parts (female). HistrionicAis histrionwus. Harlequin Duck. 



See No. 112. 

 Top of head, white ; \ving coverts, white ; rump, bluish black. 



Eniconetta stelleri. Stellers' Duck. 

 See No. 114. 



