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Species · Washington · BBS 2026 Release · 1966–2025

Western Wood-Pewee Population Trend in Washington

All statesAerial insectivores

Western Wood-Pewee in Washington has held roughly steady: down 6% on the route-weighted index since 1970.

-6%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
103Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Western Wood-Pewee Trends in WashingtonNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Western Wood-Pewee in Washington. See the full index history below.

Western Wood-Pewee Population Forecast in Washington

If the recent trend holds, Western Wood-Pewee in Washington is projected to rise about 14% by 2030 — from 9.8 in 2025 to a central estimate of 11 (95% range 7.4–15). A 5-year backtest shows a typical error of ±10.5%, with 100% of held-out values landing inside the 95% band.

+14%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
11Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
7.4–1595% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±10.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Western Wood-Pewee in Washington is projected to rise about 14% by 2030 — from 9.8 in 2025 to a central estimate of 11 (95% range 7.4–15). A 5-year backtest shows a typical error of ±10.5%, with 100% of held-out values landing inside the 95% band.19682030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
2026117.115
2027117.215
2028117.315
2029117.415
2030117.415

Western Wood-Pewee Survey Routes in Washington

Routes recording Western Wood-Pewee in Washington.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Leavenworth5120241982
Twisp4620241969
Deer Park4620151994
Turnbull Nwr4620231993
Chewelah4320211977
Ewan3720191983
Laurier3720251997
Waitsburg3020041994
L Pend O Nwr3020241995
Carnation2820251988
Lake Chelan2720251988
Nighthawk2620251992
Ellensburg2420251981
Malden2420251998
L. Wenatchee2420251993
Everett2220251975
Keller2020071968
Pomeroy1920241992
Northport1920251996
Cusick1720251982
Omak Creek1720241996
Ewan 21720252023
E. Mt. Adams1720251997
Cloverland1620251993
Ardenvoir1419871968

Western Wood-Pewee Population Trend in Other States

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Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.