Records

5 records: all Burke Museum specimens from Potholes Reservoir, Grant County.

UWBM 42991: female that had laid 3 eggs, extrapolated first-egg date 8 June 1987 (Julian day 159).

UWBM 35236: female that had laid 2 eggs, extrapolated first-egg date 8 July 1982 (Julian day 189).

UWBM 42995, 42998, 44677: males, each tending 2 or 3 small downy young, extrapolated first-egg date 16 to 18 June 1987 (Julian day 167-169).