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

Hairy Woodpecker Population Trend in Washington

All statesForest birds

Hairy Woodpecker in Washington has increased: up 42% on the route-weighted index since 1970.

+42%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 →
82Routes 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 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 Hairy Woodpecker in Washington. See the full index history below.

Hairy Woodpecker Population Forecast in Washington

If the recent trend holds, Hairy Woodpecker in Washington is projected to fall about 21% by 2029 — from 1.3 in 2024 to a central estimate of 1.0 (95% range 0.68–1.4). A 5-year backtest shows a typical error of ±18.9%, with 100% of held-out values landing inside the 95% band.

-21%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 →
1.0Projected 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 →
0.68–1.495% 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 →
±18.9%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 Washington is projected to fall about 21% by 2029 — from 1.3 in 2024 to a central estimate of 1.0 (95% range 0.68–1.4). A 5-year backtest shows a typical error of ±18.9%, 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 →
20251.00.651.4
20261.00.661.4
20271.00.671.4
20281.00.671.4
20291.00.681.4

Hairy Woodpecker Survey Routes in Washington

Routes recording Hairy Woodpecker 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 →
Omak Creek720241996
Cloverland720241993
Hurricane Rg520241992
Cougar420231973
Kendall420241981
Ardenvoir319731968
Rimrock320241970
Ronald320241976
Ilwaco320241975
Spring Lake320241982
Mt St Helens320241992
Laurier320222004
Greenwater320242016
Index 2320232014
No Cascades320191989
E. Mt. Adams320241995
Mcchord320131997
Keller220071968
Taholah220221969
Kamilche220231975
Snowden220241984
Winthrop220071989
Tonasket220091987
Leavenworth220241981
Packwood220241976

Hairy Woodpecker Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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