144. 
146. 
148. 
149. 
150. 
151. 
152. 
28 
*Aix sponsa (Linnaeus)—Woop Duck. 
Largely confined to the eastern half of the state; formerly com- 
mon, now somewhat rare. Breeds in suitable ineadies throughout 
eastern Nebraska. Arrives in spring early in April and last seen 
about the middle of October. 
Aythya americana (EKyton)—RED-HEAD. 
An abundant migrant, arriving early in March, remaining till the 
first of May, and here again throughout October and November. Al- 
though Nebraska is at the southern limit of its breeding range, a 
considerable number stay regularly in the sand-hill region and doubt- 
less breed. \ 
*Aythya vallisneria (Wilson) —CaNnvaAs-BACK. 
Rather an irregular migrant, some years abundant, others less 
common. Found in spring from late in February to the middle of 
April, and in the fall during October and November. Breeds chiefly 
from North Dakota northward, but a few are seen in summer about 
the lakes of Cherry county, where they are known to breed. A nest 
with eggs advanced in incubation was found near Cody, in northern 
Cherry county, by I. 8. Trostler in the latter part of June, 1895, and 
J. M. Bates reports the Canvas-back as breeding at Irwin in 1896 
and 1897, and at Hackberry lake in 1897. 
Aythya marila (Linnaeus)—Scaup Duck; BLUE-BILL. 
A rare migrant, though formerly more common, and most frequent 
along the Missouri river. Omaha, Lincoln, Peru, West Point, Neligh, 
Cherry county. Breeds to the northward. 
Aythya affinis (Eyton)—Lrssrer Scaup; LirrLte BLUE-BILL. 
An abundant migrant, seen from the middle of March even to the 
latter part of May and from early in October to the end of November. 
Breeds from North Dakota northward, but a few remain about the 
lakes of Cherry county all summer and it may breed there. 
Aythya collaris (Donovan)—RING-NECKED Duck. 
A common migrant, being found at the same time as the preced- 
ing. It is present in Cherry county throughout the summer and 
may breed. 
Clangula clangula americana (Bonaparte) —-GOLDEN-EYE. 
A resident from the northen boundary of the United States north- 
ward, only coming down to us during the winter, when it is not un- 
common, especially on the Platte and Missouri rivers. Seen from 
the middle of November to the end of March, sometimes lingering to 
the end of April. 
Clangula islandica (Gmelin) Rocky MountTaAIN oR BARROW GOLDEN- 
EYE. 
A rare winter visitant in eastern Nebraska, more numerous west- 
