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

Tufted Titmouse Population Trend in Maine

All statesForest birds

Tufted Titmouse in Maine has surged: up 214× on the route-weighted index since 1984.

214×Since 1984TrendPercent 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 →
37Routes 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 →
39YearsYears 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 MaineNotable 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 Maine: up 214× on the route-weighted index since 1984.

Tufted Titmouse Population Forecast in Maine

If the recent trend holds, Tufted Titmouse in Maine is projected to fall about 44% by 2029 — from 7.9 in 2024 to a central estimate of 4.4 (95% range 2.4–6.5). A 5-year backtest shows a typical error of ±37.6%, with 40% of held-out values landing inside the 95% band.

-44%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 →
4.4Projected 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 →
2.4–6.595% 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 →
±37.6%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 Maine is projected to fall about 44% by 2029 — from 7.9 in 2024 to a central estimate of 4.4 (95% range 2.4–6.5). A 5-year backtest shows a typical error of ±37.6%, with 40% of held-out values landing inside the 95% band.19792029
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 →
20254.02.06.0
20264.12.16.2
20274.22.26.3
20284.32.36.4
20294.42.46.5

Tufted Titmouse Survey Routes in Maine

Routes recording Tufted Titmouse in Maine.
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 →
Westbrook2320241989
Turner 22120242011
Kittery Pt2020241983
Bowdoin Ctr2020211989
Cape Neddick1520241986
Newcastle1420241992
Cornville1020242012
Brownfield 2920242010
Searsport920242004
Hartford820241998
Brooks820192005
Biddeford720191984
Turner620101992
Greenwood520241995
Harmony520241996
Rome520241996
Jefferson420101999
Church Hill420172000
Otisfield Gr320151986
Manchester319941994
Eastbrook320242013
South Arm220092007
East Troy220192014
Hancock220242009
Bethel120172006

Tufted Titmouse Population Trend in Other States

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

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