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Species · Connecticut · BBS 2026 Release · 1966–2025

Downy Woodpecker Population Trend in Connecticut

All statesForest birds

Downy Woodpecker in Connecticut has held roughly steady: up 2% on the route-weighted index since 1968.

+2%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 →
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 Downy 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 Downy Woodpecker in Connecticut. See the full index history below.

Downy Woodpecker Population Forecast in Connecticut

If the recent trend holds, Downy Woodpecker in Connecticut is projected to rise about 72% by 2030 — from 4.6 in 2025 to a central estimate of 8.0 (95% range 4.6–11). A 5-year backtest shows a typical error of ±50.3%, with 60% of held-out values landing inside the 95% band.

+72%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 →
8.0Projected 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 →
4.6–1195% 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 →
±50.3%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, Downy Woodpecker in Connecticut is projected to rise about 72% by 2030 — from 4.6 in 2025 to a central estimate of 8.0 (95% range 4.6–11). A 5-year backtest shows a typical error of ±50.3%, with 60% 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 →
20267.74.311
20277.84.411
20287.84.411
20297.94.511
20308.04.611

Downy Woodpecker Survey Routes in Connecticut

Routes recording Downy 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 →
Warren2020111972
Uncasville1620251973
Greenwich1220181967
Long Hill920191972
Sherman620191972
Mystic520231974
E Hartland519921966
Willimantic520181967
Westbrook420251969
Danbury420231968
Warren 2420252012
Granby420251988
Buckingham320221966
No Woodbury320251967
Southington320251974
New Hartford319871973
Woodstock220071968
Woodstock 2220252016
Mid Haddam120251973
New Hartford120241994

Downy 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 2026-08-14.