FAMILY ANATIDA:. — 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 collaris. 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. 
Clangula 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 distinet wing band of white (female). 
Glaucionetta clangula americana. Golden Eye. 
See No. 108. 
Glaucionetta clangula 
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 afinis. Lesser Scaup Duck. Blue-bill or Black=head, 
See No. 106. 
Head, black, with violet or bluish gloss, 1 spot of white on the chin; speculum, 
gray ; back, dull black (male). Aythya collaris. 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 histrionicus. Harlequin Duck. 
See No. 112. 
Top of head and wing coverts, not white; plumage, dull brown, mottled on the under- 
parts (female). Histrionicus histrionicus. Harlequin Duck. 
See No. 112. 
Top of head, white; wing coverts, white; rump, bluish black. 
Eniconetta stelleri. Stellers’ Duck. 
See No. 114. 
