Records
8 records, all clutches collected on 22 May 1926 from a colony of 30 pairs nesting on a low island in Moses Lake:
UWBM 27003: 2-egg set, Grant County, extrapolated first-egg date 17 May 1926 (Julian day 137).
PSM 11738: 2-egg set, Grant County, extrapolated first-egg date 17 May 1926 (Julian day 137).
PSM 11736: 2-egg set, Grant County, extrapolated first-egg date 17 May 1926 (Julian day 137).
PSM 11735: 2-egg set, Grant County, extrapolated first-egg date 20 May 1926 (Julian day 140).
PSM 11739: 2-egg set, Grant County, extrapolated first-egg date 20 May 1926 (Julian day 140).
PSM 11737: 2-egg set, Grant County, extrapolated first-egg date 20 May 1926 (Julian day 140).
PSM 11740: 4-egg set, Grant County, extrapolated first-egg date of 20 May 1926 (Julian day 140); this record likely represents laying by more than one female and was noted to be the only 4-egg clutch in the colony.
WFVZ: 2-egg set, Grant County, extrapolated first-egg date 20 May 1926 (Julian day 140).