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Species · Indiana · BBS 2026 Release · 1966–2025

Hairy Woodpecker Population Trend in Indiana

All statesForest birds

Hairy Woodpecker in Indiana has increased: up 48% on the route-weighted index since 1968.

+48%Since 1968TrendPercent 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 →
60Routes 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 →
59YearsYears 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 IndianaNotable 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 Indiana. See the full index history below.

Hairy Woodpecker Population Forecast in Indiana

If the recent trend holds, Hairy Woodpecker in Indiana is projected to rise about 69% by 2030 — from 0.24 in 2025 to a central estimate of 0.41 (95% range 0.13–0.68). A 5-year backtest shows a typical error of ±44.8%, with 100% of held-out values landing inside the 95% band.

+69%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 →
0.41Projected 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 →
0.13–0.6895% 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 →
±44.8%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, Hairy Woodpecker in Indiana is projected to rise about 69% by 2030 — from 0.24 in 2025 to a central estimate of 0.41 (95% range 0.13–0.68). A 5-year backtest shows a typical error of ±44.8%, with 100% of held-out values landing inside the 95% band.19662030
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 →
20260.400.120.67
20270.400.120.68
20280.400.120.68
20290.400.130.68
20300.410.130.68

Hairy Woodpecker Survey Routes in Indiana

Routes recording Hairy Woodpecker in Indiana.
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 →
Hoosier520241991
Columbia Cty320231986
Wabash320162004
Scottsburg320161984
Cross Plains320181999
Thorntown220251986
Berne220211980
Pimento220211986
Belmont220212000
Jamestown220041987
Cumback220191966
Celestine220241979
New Phila220241982
Rensselaer220192019
Lakeville220011994
Gary119951987
Hebron120251976
South Bend119891972
Knox120231985
Kewanna120221992
Middlebury120251993
Packertown119931970
Ellis119971971
Fowler120161989
Monticello120221990

Hairy Woodpecker Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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