BirdAnalyst
Species · Washington · BBS 2025 Release · 1966–2024

California Quail Population Trend in Washington

All statesGeneralists

California Quail in Washington has surged: up 319% on the route-weighted index since 1970.

+319%Since 1970
89Routes In State
56Years

Notable California Quail Trends in Washington

long arc increasecomputed index

California Quail has surged in Washington: up 319% on the route-weighted index since 1970.

California Quail Population Forecast in Washington

If the recent trend holds, California Quail in Washington is projected to rise about 73% by 2029 — from 4.2 in 2024 to a central estimate of 7.3 (95% range 3.2–11). A 5-year backtest shows a typical error of ±69.8%, with 100% of held-out values landing inside the 95% band.

+73%Change by 2029
7.3Projected 2029 index
3.2–1195% range
±69.8%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20256.92.811
20267.02.911
20277.13.011
20287.23.111
20297.33.211

California Quail Survey Routes in Washington

Routes recording California Quail in Washington.
Mesa5920081994
Malden3820241998
Ellensburg3120241981
Nighthawk2720241992
Wapato2620221971
Odessa2220241993
Deer Park2020121994
Columbia Nwr1920221992
Brewster1820151977
Moses Lake1820221988
Quincy1720241987
Pomona1719991998
Scootney Reservoir1720242009
Tonasket1620181982
Harwood1519971993
Lake Chelan1520241988
Othello1419911981
Ewan 21220242023
Chewelah1120211980
Port Angeles1020231970
Laurier1020222002
Asotin920241971
Potholes920231996
Selah820232000
Reardan720241968

California Quail Population Trend in Other States

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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.