BirdAnalyst
Species · Alabama · BBS 2026 Release · 1966–2025

Wood Thrush Population Trend in Alabama

All statesForest birds

Wood Thrush in Alabama has declined: down 40% on the route-weighted index since 1968.

-40%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 →
105Routes 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 →
59YearsYears 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 AlabamaNotable 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 Alabama. See the full index history below.

Wood Thrush Population Forecast in Alabama

If the recent trend holds, Wood Thrush in Alabama is projected to fall about 58% by 2030 — from 9.7 in 2025 to a central estimate of 4.1 (95% range 0.26–7.9). A 5-year backtest shows a typical error of ±57.9%, with 0% of held-out values landing inside the 95% band.

-58%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 →
4.1Projected 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 →
0.26–7.995% 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 →
±57.9%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 Alabama is projected to fall about 58% by 2030 — from 9.7 in 2025 to a central estimate of 4.1 (95% range 0.26–7.9). A 5-year backtest shows a typical error of ±57.9%, with 0% of held-out values landing inside the 95% band.19662030
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 →
20264.60.788.4
20274.50.658.3
20284.30.528.1
20294.20.398.0
20304.10.267.9

Wood Thrush Survey Routes in Alabama

Routes recording Wood Thrush in Alabama.
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 →
Epes3020241980
Linden2920231968
Nixburg 22720252000
Greensboro2420251966
Nixburg2419991995
Millerville2320251966
Beatrice2120211966
Lanett2020241966
Liberty City 21920252017
Howard1820251966
Carrollton1820251993
Rock Chapel1820241995
Wedowee1820231996
Swaim1720251966
Whitehall1720251983
Warrior Std1620251966
Helicon1620251996
Valhermoso Spg 21520142014
Brantley1420251966
Millry1420231970
Elkmont1420251990
Greensport1320251966
Mt Olive1320251966
Harrell1320251968
South1320251966

Wood Thrush Population Trend in Other States

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

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