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Species · Maryland · BBS 2025 Release · 1966–2024

Tufted Titmouse Population Trend in Maryland

All statesForest birds

Tufted Titmouse in Maryland has surged: up 113% on the route-weighted index since 1968.

+113%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 →
76Routes 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 MarylandNotable 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 Maryland: up 112% on the route-weighted index since 1968.

Tufted Titmouse Population Forecast in Maryland

If the recent trend holds, Tufted Titmouse in Maryland is projected to stay roughly flat through 2029, near 26 (95% range 21–30). A 5-year backtest shows a typical error of ±12.4%, with 80% of held-out values landing inside the 95% band.

+9%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 →
26Projected 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 →
21–3095% 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 →
±12.4%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 Maryland is projected to stay roughly flat through 2029, near 26 (95% range 21–30). A 5-year backtest shows a typical error of ±12.4%, with 80% 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 →
2025252029
2026252030
2027252130
2028262130
2029262130

Tufted Titmouse Survey Routes in Maryland

Routes recording Tufted Titmouse in Maryland.
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 →
Island Creek7820241991
Ijamsville6120241986
Olney5720241966
Forest Grove5420232011
Cokesbury4820241966
Jennings4520241995
Pomonkey4320241966
La Plata4220091966
Davidsnville4020241982
Furnace Town3720242015
Emmitsburg3520241966
Finzel3520241995
Fruitland3319981966
Pr Frederick3320241991
Oldtown3020241970
Hughesville3020241966
Nottingham2920242005
Silver Spg2719891966
Eklo2620181966
Piney Grove2620241995
Earlton2620242014
Pt Republic2519891966
St. George'S Island2520172015
Williamsport2420241966
Tall Timbers2320141966

Tufted Titmouse Population Trend in Other States

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

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