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Species · Pennsylvania · BBS 2026 Release · 1966–2025

Tufted Titmouse Population Trend in Pennsylvania

All statesForest birds

Tufted Titmouse in Pennsylvania has surged: up 145% on the route-weighted index since 1968.

+145%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 Tufted Titmouse 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 →

Tufted Titmouse has surged in Pennsylvania: up 145% on the route-weighted index since 1968.

Tufted Titmouse Population Forecast in Pennsylvania

If the recent trend holds, Tufted Titmouse in Pennsylvania is projected to rise about 24% by 2030 — from 9.3 in 2025 to a central estimate of 12 (95% range 8.6–15). A 5-year backtest shows a typical error of ±31.1%, with 60% of held-out values landing inside the 95% band.

+24%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 →
12Projected 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 →
8.6–1595% 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 →
±31.1%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, Tufted Titmouse in Pennsylvania is projected to rise about 24% by 2030 — from 9.3 in 2025 to a central estimate of 12 (95% range 8.6–15). A 5-year backtest shows a typical error of ±31.1%, with 60% 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 →
2026118.214
2027118.314
2028118.414
2029118.514
2030128.615

Tufted Titmouse Survey Routes in Pennsylvania

Routes recording Tufted Titmouse 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 →
Duvall3720211974
Greentown3020241969
Waller2720251971
Geeseytown2620251987
Stoneybreak2620251992
Ramsey2420251968
Beaver2420251969
Munson2420251979
Mawr Glen2220251982
Millville2220251969
Canadensis2020251969
Doylesburg2020232009
Hometown1920251968
Espyville1820251967
Ryde1820051968
Mt Gretna1820001966
Needmore1719911966
Harrisville1720251995
Marsh Hill1620251983
Hop Bottom1620251967
Berwick1620251985
Williamsburg1520251988
Middletown1520251973
Kittanning1420251972
Virginia1420251969

Tufted Titmouse Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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