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Species · Pennsylvania · BBS 2025 Release · 1966–2024

Eastern Towhee Population Trend in Pennsylvania

All statesGeneralists

Eastern Towhee in Pennsylvania has held roughly steady: down 9% on the route-weighted index since 1968.

-9%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 Towhee 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 →

No notable trend signals for Eastern Towhee in Pennsylvania. See the full index history below.

Eastern Towhee Population Forecast in Pennsylvania

If the recent trend holds, Eastern Towhee in Pennsylvania is projected to stay roughly flat through 2029, near 11 (95% range 8.2–14). A 5-year backtest shows a typical error of ±10.3%, with 100% of held-out values landing inside the 95% band.

-7%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 →
11Projected 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 →
8.2–1495% 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 →
±10.3%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 Towhee in Pennsylvania is projected to stay roughly flat through 2029, near 11 (95% range 8.2–14). A 5-year backtest shows a typical error of ±10.3%, 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 →
2025118.114
2026118.114
2027118.114
2028118.114
2029118.214

Eastern Towhee Survey Routes in Pennsylvania

Routes recording Eastern Towhee 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 →
Sproul Sf-A6120242002
Duboistown6020241987
Sproul Sf-B5020242002
Broad Mtn.4920241993
Rothrock Sf4720191992
Tussey Mtn.3820241993
Odin3520241973
English Ctr3019891966
Duvall2920211974
Margaret2720241969
Normalville2619741966
Rector2519771966
Big Flat2519811966
Pottersdale2420241968
Mill Run2420241978
Marsh Hill2320241983
Waller2320241971
Warrens Mill2220241971
Ltl Pine Cr2220241990
Sigel2120241981
Virginia2120241969
Laurel Hill2120241978
Needmore2019911966
Ellenton2020241982
Landisburg2020241978

Eastern Towhee Population Trend in Other States

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

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