BirdAnalyst
Species · Massachusetts · BBS 2026 Release · 1966–2025

Tufted Titmouse Population Trend in Massachusetts

All statesForest birds

Tufted Titmouse in Massachusetts has surged: up 121× on the route-weighted index since 1970.

121×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 →
57YearsYears 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 121× 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 stay roughly flat through 2030, near 30 (95% range 25–35). A 5-year backtest shows a typical error of ±6.4%, with 100% of held-out values landing inside the 95% band.

+8%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 →
30Projected 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 →
25–3595% 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 →
±6.4%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, Tufted Titmouse in Massachusetts is projected to stay roughly flat through 2030, near 30 (95% range 25–35). A 5-year backtest shows a typical error of ±6.4%, with 100% of held-out values landing inside the 95% band.19672030
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 →
2026282333
2027282333
2028292434
2029292434
2030302535

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
Belchertown6320251969
S Barre4320251972
Marion4020251969
Mansfield3920251969
Maynard2820251971
N Orange2820251983
Wellfleet 22820252016
Wellfleet2520071979
Littleton2520251973
Chesterfield2520251989
Monterey2520252019
N. Andover2520251995
E Dennis2320211970
Prattville2320191971
Warren2120091971
Warren 22120252010
Newburyport1920221967
Holden1920251977
Cummington 21720252015
Sheffield1420221973
Hancock1420151997
Ware River1320221993
N Oxford1220251970
Pittsfield1120161988

Tufted Titmouse Population Trend in Other States

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

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