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Species · Pennsylvania · BBS 2025 Release · 1966–2024

Eastern Wood-Pewee Population Trend in Pennsylvania

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Eastern Wood-Pewee in Pennsylvania has surged: up 101% on the route-weighted index since 1968.

+101%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 →
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 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 101% 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 22% by 2029 — from 7.1 in 2024 to a central estimate of 5.5 (95% range 3.7–7.4). A 5-year backtest shows a typical error of ±18.3%, with 80% of held-out values landing inside the 95% band.

-22%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 →
5.5Projected 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 →
3.7–7.495% 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 →
±18.3%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, Eastern Wood-Pewee in Pennsylvania is projected to fall about 22% by 2029 — from 7.1 in 2024 to a central estimate of 5.5 (95% range 3.7–7.4). A 5-year backtest shows a typical error of ±18.3%, with 80% 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 →
20255.53.67.3
20265.53.77.3
20275.53.77.3
20285.53.77.3
20295.53.77.4

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.4220241993
Harmonsburg2820231966
South Mtn2420231986
Landisburg2220241978
Laurel Hill2120241978
Broad Mtn.2120241993
Stoneybreak2020241992
Canadensis1820241970
Clear Spring1820241966
Sugar Grove1820241980
Jefferson1420241966
Drehersville 21420242001
Chatham1420241997
Honesdale1320241972
Susquehanna1320241971
Duvall1320211974
Naginey1320241970
Warrens Mill1320241971
Needmore1319911966
Big Flat1319811966
Ryde1220051968
N Pine Grove1120241969
Odin1120241973
Plesant Grov1120241967
Rector1119771966

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 2026-05-22.