Records

81. Burke Museum nest record cards=29; egg sets=52.

Counties

Clark=6; Cowlitz=7; Grant=12; King=1; Kitsap=1; Mason=1; Pierce=1; San Juan=2; Skagit=26; Snohomish=2; Spokane=11; Thurston=2; Whatcom=4; Yakima=5.

First-egg dates

Earliest 25 February (Julian day 56); latest 11 June (Julian day 162). First-egg dates are unimodal, extending over a 16-week season.

Clutch size

52 usable records. Mean 4.3 eggs.

Season and clutch size

Clutch size did not change significantly with season (r2=0.219).