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

White-headed Woodpecker Population Trend in Oregon

All statesForest birds

White-headed Woodpecker in Oregon has surged: up 144% on the route-weighted index since 1974.

+144%Since 1974TrendPercent 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 →
35Routes 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 →
45YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable White-headed Woodpecker Trends in OregonNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

White-headed Woodpecker has surged in Oregon: up 144% on the route-weighted index since 1974.

White-headed Woodpecker Population Forecast in Oregon

If the recent trend holds, White-headed Woodpecker in Oregon is projected to stay roughly flat through 2029, near 0.17 (95% range 0.05–0.28). A 5-year backtest shows a typical error of ±29.8%, with 100% of held-out values landing inside the 95% band.

+4%Change by 2029TrendPercent 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 →
0.17Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.05–0.2895% 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 →
±29.8%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, White-headed Woodpecker in Oregon is projected to stay roughly flat through 2029, near 0.17 (95% range 0.05–0.28). A 5-year backtest shows a typical error of ±29.8%, with 100% of held-out values landing inside the 95% band.19702029
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 →
20250.160.040.28
20260.160.050.28
20270.160.050.28
20280.170.050.28
20290.170.050.28

White-headed Woodpecker Survey Routes in Oregon

Routes recording White-headed Woodpecker in Oregon.
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 →
Donelly 2420242018
Ochoco320211993
Albee219761971
Summit Pr220221982
Ochoco219751975
Modoc Point220101970
Camp Sherman219941974
Unity220242024
Newbridge220131992
Silvies220241995
Picture Flat220142008
Donnelly220052005
Lakeview220231997
Modoc Point 2120242024
Flora120042004
Lapham Res.120241996
Logdell120192019
Wickiup120031992
Wizard Falls120222002
Dell Spring119781978
Bly 2120232007
Eagle Rock119741974
Barnes Val119741974
Mount Vernon120221993
Clearwater120092009

White-headed Woodpecker Population Trend in Other States

californiaidahowashington

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