* Aythya americana (Eyton). Redhead. Fairly common transient and occasional winter resident throughout state. Frank Robl found a nesting pair in Cheyenne Bottoms, Barton County, in 1928 (approximate). The adults were neither captives nor cripples.
No subspecies recognized.
Aythya collaris (Donovan). Ring-necked Duck. Fairly common transient throughout state, rare winter resident.
No subspecies recognized.
Aythya valisineria (Wilson). Canvas-back. Fairly common transient and occasional winter resident throughout state.
No subspecies recognized.
Aythya marila. Greater Scaup Duck. Rare transient, status poorly known. Several sight records, one in winter. Floyd T. Amsden, a competent sportsman and amateur ornithologist of Wichita, identified 3 male specimens killed 3 miles north and 1 mile east of Sharon, Barber County, on October 27 (2) and November 3 (1), 1951. Frank Robl has seen specimens killed in Cheyenne Bottoms, Barton County. Every effort should be made to preserve specimens from Kansas.
Subspecies in Kansas: A. m. nearctica Stejneger, on geographical grounds.
Aythya affinis (Eyton). Lesser Scaup Duck. Common transient throughout state. A few records of wintering and summering (non-*breeding) individuals.
No subspecies recognized.