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

Hairy Woodpecker Population Trend in Oregon

All statesForest birds

Hairy Woodpecker in Oregon has held roughly steady: up 7% on the route-weighted index since 1970.

+7%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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Hairy 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 →

No notable trend signals for Hairy Woodpecker in Oregon. See the full index history below.

Hairy Woodpecker Population Forecast in Oregon

If the recent trend holds, Hairy Woodpecker in Oregon is projected to fall about 12% by 2029 — from 1.6 in 2024 to a central estimate of 1.4 (95% range 0.87–2.0). A 5-year backtest shows a typical error of ±15%, with 100% of held-out values landing inside the 95% band.

-12%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 →
1.4Projected 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 →
0.87–2.095% 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 →
±15%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, Hairy Woodpecker in Oregon is projected to fall about 12% by 2029 — from 1.6 in 2024 to a central estimate of 1.4 (95% range 0.87–2.0). A 5-year backtest shows a typical error of ±15%, with 100% of held-out values landing inside the 95% band.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 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 →
20251.40.851.9
20261.40.851.9
20271.40.862.0
20281.40.862.0
20291.40.872.0

Hairy Woodpecker Survey Routes in Oregon

Routes recording Hairy 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 →
Black Mtn.1520041993
Silvies1420241995
Bly 21220242007
Paisley1120241973
Silver Creek1120241984
Hazel Camp820221975
Ochoco619821972
Wickiup620241969
Mount Vernon620241986
Barnhouse620241998
Bald Mtn.620241992
Sisters620241997
Lakeview620241996
Dell Spring519901968
Davis Lake520242000
Cool Camp420091968
Joseph420121972
Svensen419921991
Granite420241987
Bly420011973
Summit Pr420241981
Howard Mdws.420191993
Ochoco420241993
Desolation420071993
Fisher420101997

Hairy Woodpecker Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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