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Species · South Carolina · BBS 2025 Release · 1966–2024

Tufted Titmouse Population Trend in South Carolina

All statesForest birds

Tufted Titmouse in South Carolina has surged: up 273% on the route-weighted index since 1968.

+273%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 →
51Routes 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 South CarolinaNotable 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 South Carolina: up 273% on the route-weighted index since 1968.

Tufted Titmouse Population Forecast in South Carolina

If the recent trend holds, Tufted Titmouse in South Carolina is projected to rise about 31% by 2029 — from 19 in 2024 to a central estimate of 25 (95% range 17–32). A 5-year backtest shows a typical error of ±31.1%, with 80% of held-out values landing inside the 95% band.

+31%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 →
25Projected 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 →
17–3295% 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 →
±31.1%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 South Carolina is projected to rise about 31% by 2029 — from 19 in 2024 to a central estimate of 25 (95% range 17–32). A 5-year backtest shows a typical error of ±31.1%, 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 →
2025241631
2026241631
2027241732
2028241732
2029251732

Tufted Titmouse Survey Routes in South Carolina

Routes recording Tufted Titmouse in South Carolina.
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 →
Kiawah Island5120241998
Rome3620241967
Little Mtn3519881966
Green Sea3420242010
Chesnee3420151992
Walterboro3020171970
Carvers Bay2920121998
Ridgeway2620212010
New Holland2520241967
Dillon2520211971
New Ellenton2420242010
Campobello2420242010
Blacksburg2220131998
Anderson2120181977
Salem Xrd2020191982
Prosperity2020241992
Plum Branch1920241977
Adams Run1820241988
Holly Hill1720241972
Wagener1720241967
Olar1720191998
Ward1620212017
Greenwood1620191998
Owings1520041992
Kingstree1520102010

Tufted Titmouse Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandtennesseetexasvermontvirginiawest-virginiawisconsin

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