BirdAnalyst
Species · Connecticut · BBS 2025 Release · 1966–2024

Tufted Titmouse Population Trend in Connecticut

All statesForest birds

Tufted Titmouse in Connecticut has surged: up 358% on the route-weighted index since 1968.

+358%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 →
20Routes 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 ConnecticutNotable 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 Connecticut: up 358% on the route-weighted index since 1968.

Tufted Titmouse Population Forecast in Connecticut

If the recent trend holds, Tufted Titmouse in Connecticut is projected to rise about 66% by 2029 — from 18 in 2024 to a central estimate of 30 (95% range 20–40). A 5-year backtest shows a typical error of ±76%, with 0% of held-out values landing inside the 95% band.

+66%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 →
30Projected 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 →
20–4095% 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 →
±76%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 Connecticut is projected to rise about 66% by 2029 — from 18 in 2024 to a central estimate of 30 (95% range 20–40). A 5-year backtest shows a typical error of ±76%, 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 →
2025281839
2026291839
2027291940
2028301940
2029302040

Tufted Titmouse Survey Routes in Connecticut

Routes recording Tufted Titmouse in Connecticut.
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 →
Willimantic5620181967
Warren5320111972
Woodstock 23920242016
Greenwich3520181967
Granby2520241988
Uncasville2220241973
Long Hill2020191972
Woodstock1920071968
Southington1920241973
E Hartland1719921966
Sherman1720191972
Westbrook1620241969
Mid Haddam1620241973
Mystic1220231973
Warren 21220242012
Danbury920231968
New Hartford820241994
Buckingham720221967
No Woodbury620241968
New Hartford519871972

Tufted Titmouse Population Trend in Other States

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

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