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Species · Massachusetts · BBS 2025 Release · 1966–2024

Tufted Titmouse Population Trend in Massachusetts

All statesForest birds

Tufted Titmouse in Massachusetts has surged: up 113× on the route-weighted index since 1970.

113×Since 1970TrendPercent 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 →
32Routes 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 →
56YearsYears 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 MassachusettsNotable 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 Massachusetts: up 113× on the route-weighted index since 1970.

Tufted Titmouse Population Forecast in Massachusetts

If the recent trend holds, Tufted Titmouse in Massachusetts is projected to rise about 17% by 2029 — from 25 in 2024 to a central estimate of 29 (95% range 24–34). A 5-year backtest shows a typical error of ±7%, with 100% of held-out values landing inside the 95% band.

+17%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 →
29Projected 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 →
24–3495% 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%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 Massachusetts is projected to rise about 17% by 2029 — from 25 in 2024 to a central estimate of 29 (95% range 24–34). A 5-year backtest shows a typical error of ±7%, with 100% of held-out values landing inside the 95% band.19672029
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 →
2025272232
2026282333
2027282333
2028292434
2029292434

Tufted Titmouse Survey Routes in Massachusetts

Routes recording Tufted Titmouse in Massachusetts.
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 →
Brockton8520191969
Belchertown6820241969
Marion4020241969
Wellfleet 23520242016
S Barre3420241972
N Orange2820241983
Maynard2720221971
N Oxford2620241970
Wellfleet2520071979
N. Andover2520241995
E Dennis2320211970
Prattville2320191971
Mansfield2220241969
Warren2120091971
Monterey2120242019
Holden2020241977
Newburyport1920221967
Sheffield1420221973
Warren 21420242010
Hancock1420151997
Chesterfield1320241989
Ware River1320221993
Littleton1220241973
Pittsfield1120161988
Cummington 21020242015

Tufted Titmouse Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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