137. Baldpate. Mareca americana. Summer resident; breeds from plains to 8,000 feet.
139. Green-winged teal. Nettion carolinensis. Common summer resident; abundant in migration; a few breed on the plains; more in mountains and upper parks.
140. Blue-winged teal. Querquedula discors. Same records as preceding.
141. Cinnamon teal. Querquedula cyanoptera. Common summer resident; breeds both east and west of the range; a western species; in winter south to Chili, Argentina, and Falkland Islands; sometimes strays east as far as Illinois and Louisiana.
142. Shoveller. Spatula clypeata. Summer resident; abundant in migration; breeds in suitable localities, but prefers mountain parks 8,000 feet in altitude; breeds throughout its range, which is the whole of North America.
143. Pintail. Dafila acuta. Rare summer and winter resident; common migrant; mostly breeds in the North.
144. Wood duck. Aix sponsa. Rare summer resident.
146. Redhead. Aythya americana. Common migrant; breeds far north; migrates early in spring.
147. Canvas-back. Aythya vallisneria. Migrant; not common; breeds far north.
148. Scaup duck. Aythya marila. Rare migrant; both sides of the range; breeds far north.