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Species · Connecticut · BBS 2025 Release · 1966–2024

Hairy Woodpecker Population Trend in Connecticut

All statesForest birds

Hairy Woodpecker in Connecticut has edged down: down 20% on the route-weighted index since 1968.

-20%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 →
20Routes 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 →
58YearsYears 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 ConnecticutNotable 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 Connecticut. See the full index history below.

Hairy Woodpecker Population Forecast in Connecticut

If the recent trend holds, Hairy Woodpecker in Connecticut is projected to rise about 73% by 2029 — from 0.56 in 2024 to a central estimate of 0.96 (95% range 0.05–1.9). A 5-year backtest shows a typical error of ±38.6%, with 100% of held-out values landing inside the 95% band.

+73%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 →
0.96Projected 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 →
0.05–1.995% 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 →
±38.6%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 Connecticut is projected to rise about 73% by 2029 — from 0.56 in 2024 to a central estimate of 0.96 (95% range 0.05–1.9). A 5-year backtest shows a typical error of ±38.6%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20250.960.051.9
20260.960.051.9
20270.960.051.9
20280.960.051.9
20290.960.051.9

Hairy Woodpecker Survey Routes in Connecticut

Routes recording Hairy Woodpecker in Connecticut.
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 →
Warren1020111973
No Woodbury320231967
Mid Haddam320231974
Woodstock220031968
Sherman220161975
Danbury220171968
Mystic120221973
E Hartland119911966
Buckingham120221966
Uncasville120241977
Westbrook120181969
Willimantic120181967
Greenwich120181967
Long Hill120191972
Southington120231976
New Hartford119841974
New Hartford120241994
Woodstock 2120242016
Warren 2120242012
Granby120241989

Hairy Woodpecker Population Trend in Other States

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

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