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

Wood Thrush Population Trend in Louisiana

All statesForest birds

Wood Thrush in Louisiana has edged up: up 17% on the route-weighted index since 1969.

+17%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 →
73Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Wood Thrush 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 →

No notable trend signals for Wood Thrush in Louisiana. See the full index history below.

Wood Thrush Population Forecast in Louisiana

If the recent trend holds, Wood Thrush in Louisiana is projected to fall about 29% by 2029 — from 4.8 in 2024 to a central estimate of 3.4 (95% range 0.91–5.9). A 5-year backtest shows a typical error of ±42.7%, with 40% of held-out values landing inside the 95% band.

-29%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 →
3.4Projected 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 →
0.91–5.995% 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 →
±42.7%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, Wood Thrush in Louisiana is projected to fall about 29% by 2029 — from 4.8 in 2024 to a central estimate of 3.4 (95% range 0.91–5.9). A 5-year backtest shows a typical error of ±42.7%, with 40% of held-out values landing inside the 95% band.19672029
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 →
20253.50.996.0
20263.50.976.0
20273.40.955.9
20283.40.935.9
20293.40.915.9

Wood Thrush Survey Routes in Louisiana

Routes recording Wood Thrush 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 →
Bickham2020241984
Norwood1920242004
Fishville 21520242018
Chatham1419751967
Fort Jessup1320231998
Burr Ferry1320241987
Plettenberg1220221968
Clay1220241968
Pine Prairie1219971995
Goodwill1120242004
Linville1120241998
Greensburg1020221988
Lake Cove1020182008
Grayson1020212005
Flat Creek920241998
Franklinton820242008
Trout820241988
Oakdale819941991
Roseland720241967
Fishville720171967
Evelyn720242004
Lacombe619831967
Mayflower620241967
Fort Polk619751967
Marion619961988

Wood Thrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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