Anas discors Linnaeus. Blue-winged Teal. Rare resident. Merriam (1891:90) records two shot on Saw Tooth Lake (=Alturas Lake, Blaine County), about October 1.
Anas cyanoptera Vieillot. Cinnamon Teal. Uncommon resident. I observed a female with four young in Bellevue, Blaine County, in July, 1942, and Merrill (1897:350) records a female with young on June 11 at Fort Sherman.
Anas strepera Linnaeus. Gadwall. Resident locally; fairly common in migration. (D. A. 1310, Havenor's, 7 mi. NW Pocatello, Power County, January 2, 1939.)
Mareca americana (Gmelin). Baldpate. Common during migration, and resident along the Snake River. (D. A. 1747, 1 mi. W Bowman Ranch on Boise River, Canyon County, October 26, 1940.)
Spatula clypeata (Linnaeus). Shoveller. Common in migration, and breeds locally. (D. A. 1492, Wallace, Shoshone County, October 22, 1939.)
Aix sponsa (Linnaeus). Wood Duck. Fairly common in migration, and resident locally. Merrill (1897:350) records it as a summer resident at Fort Sherman.
Aythya americana (Eyton). Redhead. Fairly common migrant. Recorded by Merrill (1897:350) at Fort Sherman.
Aythya collaris (Donovan). Ring-necked Duck. Uncommon transient. Merrill (1897:350) records it at Fort Sherman.
Aythya valisineria (Wilson). Canvas-back. Fairly common in migration, and recorded by Low and Nelson (1945:131) as breeding in Bonneville and Caribou counties.
Aythya marila (Linnaeus). Greater Scaup Duck. Fairly common migrant. Davis (1935b:236) records one bird from the Minidoka Project taken on March 28, 1920.