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Species · Pennsylvania · BBS 2026 Release · 1966–2025

Eastern Wood-Pewee Population Trend in Pennsylvania

All statesAerial insectivores

Eastern Wood-Pewee in Pennsylvania has surged: up 105% on the route-weighted index since 1968.

+105%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 →
136Routes 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 PennsylvaniaNotable 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 surged in Pennsylvania: up 105% on the route-weighted index since 1968.

Eastern Wood-Pewee Population Forecast in Pennsylvania

If the recent trend holds, Eastern Wood-Pewee in Pennsylvania is projected to fall about 16% by 2030 — from 6.8 in 2025 to a central estimate of 5.7 (95% range 3.8–7.5). A 5-year backtest shows a typical error of ±23.5%, with 80% of held-out values landing inside the 95% band.

-16%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 →
3.8–7.595% 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 →
±23.5%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 Pennsylvania is projected to fall about 16% by 2030 — from 6.8 in 2025 to a central estimate of 5.7 (95% range 3.8–7.5). A 5-year backtest shows a typical error of ±23.5%, 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 →
20265.63.77.4
20275.63.87.4
20285.63.87.5
20295.63.87.5
20305.73.87.5

Eastern Wood-Pewee Survey Routes in Pennsylvania

Routes recording Eastern Wood-Pewee in Pennsylvania.
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 →
Tussey Mtn.3020251993
Mill Run2920251978
South Mtn2720251986
Clear Spring2120251966
Laurel Hill2120251978
Landisburg2120251978
Stoneybreak2020251992
Jefferson1720251966
Geeseytown1620251987
Sugar Grove1620251980
Broad Mtn.1520251993
Chatham1420251997
Espyville1320251967
Canadensis1320251970
Beaver1320251969
Duvall1320211974
Needmore1319911966
Big Flat1319811966
Drehersville 21320252001
Ryde1220051968
Hop Bottom1120251967
Honesdale1120251972
Plesant Grov1120241967
Rector1119771966
Carsonville1120231973

Eastern Wood-Pewee Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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