NESTING SEASON OVERVIEW CHART



Timing of Events in Nesting Season*

Compiled by Darlene Betat using All About Birds by Cornell Lab of Ornithology

and Oregon Birds by David Marshall


from the Backyard Bird Shop website, http://backyardbirdshop.com

Species Nest Construction Clutch Size (#eggs) Incubation Period Nesting Period
Anna’s Hummingbird MID-JAN to MID-JUN:  ♀ builds cup nest; raises young on her own 2 eggs 14–19 days 20 days
Black-capped Chicadee LATE MAR to EARLY Apr; cavity excavated by ♀/♂; inner nest built by ♀ 1-13 eggs 12-13 days 16 days
Bushtit JAN/FEB pairs leave flocks to begin building a hanging sock-like nest 4-7 eggs 12 days 14 days
California
Scrub-Jay
LATE FEB – LATE MAY: basket-like nest with inner cup 3-6 eggs 17-19 days 17-19 days
American Crow EARLY to MID-APR: ♀/♂ build large bulky nest, with inner lined cup 4-8 eggs 16-18 days 20-40 days
Bewick’s Wren EARLY to MID-MAR: ♂ initiates nest-building, ♂helpcomplete it 3-6 eggs 14 days 14-17 days
Red-breasted Nuthatch MID-APR to MID-JUN: both ♀/♂ excavate cavity 5-8 eggs 12-13 days 18-21 days
Steller’s Jay LATE MAR to LATE JUN: ♀/♂ build bulky cup nest with inner lined cup 4-5 eggs 16 days 16 days
Downy Woodpecker LATE-APR to LATE-MAY:  both ♀/♂  excavate cavity (takes 1-3 weeks) 4-5 eggs 12 days 18-21 days
Northern Flicker MID-APR TO MID-MAY; ♀/♂ excavate cavity 5-10 eggs 11-13 days 24-27 days
Violet-green Swallow APR-JUN; built grassy nest inside existing cavity 4-6 eggs 15 days 23 days
Tree Swallow MAR-JUN; nest built inside existing cavity by ♀ 5-7 eggs 14 days 16-24 days
Chestnut-backed Chickadee LATE MAR to MID-JUN ♂ selects cavity or nest site; inner nest built by ♀ 4-10 eggs 19 days 18-21 days
Pileated Woodpecker LATE MAR – EARLY MAY: takes 3-6 weeks; ♂does bulk of the excavating 4 eggs 15-18 days 24-31 days
Dark-eyed Junco Cup nest constructed by ♀ 3-5 eggs 12-13 days 10-13 days
 
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