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

Western Bluebird Population Trend in Washington

All statesForest birds

Western Bluebird in Washington has surged: up 103% on the route-weighted index since 1970.

+103%Since 1970
39Routes In State
55Years

Notable Western Bluebird Trends in Washington

long arc increasecomputed index

Western Bluebird has surged in Washington: up 103% on the route-weighted index since 1970.

Western Bluebird Population Forecast in Washington

If the recent trend holds, Western Bluebird in Washington is projected to stay roughly flat through 2029, near 1.2 (95% range 0.74–1.6). A 5-year backtest shows a typical error of ±17.7%, with 100% of held-out values landing inside the 95% band.

+10%Change by 2029
1.2Projected 2029 index
0.74–1.695% range
±17.7%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
20251.10.681.5
20261.10.701.5
20271.10.711.5
20281.10.721.6
20291.20.741.6

Western Bluebird Survey Routes in Washington

Routes recording Western Bluebird in Washington.
Ellensburg2820241981
Pomeroy1920241992
Ewan 2620232023
Selah420122003
Turnbull Nwr320231993
Northport320181998
Lake Chelan320241988
Twisp220241983
Kamilche219871987
Ardenvoir219871985
Reardan220181968
Cougar220212021
Snowden220231971
Bickleton220181983
Tonasket220161988
Wilbur220221997
Ewan220021995
Nighthawk220231999
Hurricane Rg220212016
Harwood219931993
Omak Creek220241998
Laurier220211996
Cloverland220142014
Keller120071968
Chewelah120211977

Western Bluebird Population Trend in Other States

arizonacaliforniacoloradoidahomontananevadanew-mexicooregontexasutahwyoming

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