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Species · Louisiana · BBS 2026 Release · 1966–2025

Tufted Titmouse Population Trend in Louisiana

All statesForest birds

Tufted Titmouse in Louisiana has surged: up 140% on the route-weighted index since 1969.

+140%Since 1969TrendPercent 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 →
94Routes 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 LouisianaNotable 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 Louisiana: up 140% on the route-weighted index since 1969.

Tufted Titmouse Population Forecast in Louisiana

If the recent trend holds, Tufted Titmouse in Louisiana is projected to fall about 23% by 2030 — from 18 in 2025 to a central estimate of 14 (95% range 9.9–18). A 5-year backtest shows a typical error of ±31.3%, with 0% of held-out values landing inside the 95% band.

-23%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 →
14Projected 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 →
9.9–1895% 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 →
±31.3%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 Louisiana is projected to fall about 23% by 2030 — from 18 in 2025 to a central estimate of 14 (95% range 9.9–18). A 5-year backtest shows a typical error of ±31.3%, with 0% 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 →
2026149.418
2027149.518
2028149.718
2029149.818
2030149.918

Tufted Titmouse Survey Routes in Louisiana

Routes recording Tufted Titmouse in Louisiana.
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 →
Atchafalaya4320251989
Ramah4220251988
Tensas Nwr4220251987
Plettenberg3620221968
Mount Union3620251998
Lafitte3519911967
Goodwill3420252004
Natchez3320251992
Ivan 23020252014
Flat Creek2920251998
Derry 22820251990
Chatham2719751967
Longstreet2720251967
Ivan2720131998
Womack2520251999
Burr Ferry2520251987
Cheniere2520251984
Greensburg2420221988
Fort Jessup2420231998
Linville2420251998
Easton2319901967
Pearl River2320251989
Norwood2220252004
Kraemer2220251997
Evelyn2220242004

Tufted Titmouse Population Trend in Other States

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

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