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Species · Pennsylvania · BBS 2025 Release · 1966–2024

Tufted Titmouse Population Trend in Pennsylvania

All statesForest birds

Tufted Titmouse in Pennsylvania has surged: up 137% on the route-weighted index since 1968.

+137%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 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 137% 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 36% by 2029 — from 8.6 in 2024 to a central estimate of 12 (95% range 8.7–15). A 5-year backtest shows a typical error of ±53.3%, with 0% of held-out values landing inside the 95% band.

+36%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 →
12Projected 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 →
8.7–1595% 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 →
±53.3%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, Tufted Titmouse in Pennsylvania is projected to rise about 36% by 2029 — from 8.6 in 2024 to a central estimate of 12 (95% range 8.7–15). A 5-year backtest shows a typical error of ±53.3%, with 0% 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 →
2025118.214
2026118.314
2027118.414
2028118.614
2029128.715

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
Canadensis3420241969
Greentown3020241969
Stoneybreak2720241992
Millville2620241969
Waller2120241971
Berwick2120241985
Doylesburg2020232009
Ryde1820051968
Mt Gretna1820001966
Kittanning1720241972
Pine Gr Mill1720241967
Needmore1719911966
Sigel1620241987
Mawr Glen1620241982
Pocono Summit1620241969
Marsh Hill1520241983
Mars1520241989
Mill Run1520241978
Ramsey1420231968
Munson1420241979
Naginey1420241970
Clear Spring1420241966
Jeannette1420231979
Parkwood1320241967

Tufted Titmouse Population Trend in Other States

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

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