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Species · Connecticut · BBS 2026 Release · 1966–2025

Eastern Wood-Pewee Population Trend in Connecticut

All statesAerial insectivores

Eastern Wood-Pewee in Connecticut has risen sharply: up 52% on the route-weighted index since 1968.

+52%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 Eastern Wood-Pewee 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Eastern Wood-Pewee has risen sharply in Connecticut: up 52% on the route-weighted index since 1968.

Eastern Wood-Pewee Population Forecast in Connecticut

If the recent trend holds, Eastern Wood-Pewee in Connecticut is projected to fall about 23% by 2030 — from 7.5 in 2025 to a central estimate of 5.7 (95% range 3.8–7.7). A 5-year backtest shows a typical error of ±10.5%, with 80% of held-out values landing inside the 95% band.

-23%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 →
5.7Projected 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 →
3.8–7.795% 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 →
±10.5%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, Eastern Wood-Pewee in Connecticut is projected to fall about 23% by 2030 — from 7.5 in 2025 to a central estimate of 5.7 (95% range 3.8–7.7). A 5-year backtest shows a typical error of ±10.5%, with 80% 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 →
20265.63.67.5
20275.63.77.6
20285.73.77.6
20295.73.87.7
20305.73.87.7

Eastern Wood-Pewee Survey Routes in Connecticut

Routes recording Eastern Wood-Pewee 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 →
Uncasville1720251973
Warren1520111972
Woodstock 21320252016
Sherman1220191973
Granby1020251988
Mid Haddam920251973
Woodstock820071968
Willimantic720181967
Long Hill620191972
New Hartford520241994
Warren 2520252012
E Hartland419921966
Danbury420231968
Mystic320231973
Buckingham320221966
No Woodbury320251967
Greenwich320181967
New Hartford319871972
Southington220251973
Westbrook120251969

Eastern Wood-Pewee Population Trend in Other States

alabamaarkansasdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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