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Species · Pennsylvania · BBS 2026 Release · 1966–2025

Eastern Towhee Population Trend in Pennsylvania

All statesForest birds

Eastern Towhee in Pennsylvania has held roughly steady: down 10% on the route-weighted index since 1968.

-10%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 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 2030, near 11 (95% range 8.2–14). A 5-year backtest shows a typical error of ±7.4%, with 100% of held-out values landing inside the 95% band.

-3%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 →
11Projected 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 →
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 →
±7.4%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 2030, near 11 (95% range 8.2–14). A 5-year backtest shows a typical error of ±7.4%, with 100% 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 →
2026118.114
2027118.214
2028118.214
2029118.214
2030118.214

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 →
Duboistown6020241987
Sproul Sf-B5020252002
Sproul Sf-A4920252002
Rothrock Sf4720191992
Tussey Mtn.4620251993
Odin4420251973
Parkwood3520251967
Broad Mtn.3220251993
Virginia3120251969
English Ctr3019891966
Duvall2920211974
Mill Run2920251978
Normalville2619741966
Sigel2520251981
N Washington2520251967
Rector2519771966
Big Flat2519811966
Ltl Pine Cr2420251990
Margaret2220251969
Jefferson2220251966
South Mtn2220251986
Kittanning2120251972
Ansonia2120252002
Waller2020251971
Munson2020251979

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 2026-08-14.