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

Wood Thrush Population Trend in Alabama

All statesForest birds

Wood Thrush in Alabama has declined: down 43% on the route-weighted index since 1968.

-43%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 →
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 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 54% by 2029 — from 8.2 in 2024 to a central estimate of 3.8 (95% range 0.20–7.4). A 5-year backtest shows a typical error of ±51.5%, with 20% of held-out values landing inside the 95% band.

-54%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 →
3.8Projected 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 →
0.20–7.495% 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 →
±51.5%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 54% by 2029 — from 8.2 in 2024 to a central estimate of 3.8 (95% range 0.20–7.4). A 5-year backtest shows a typical error of ±51.5%, with 20% 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 →
20254.40.768.0
20264.20.627.8
20274.10.487.7
20283.90.347.5
20293.80.207.4

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
Nixburg2419991995
Liberty City 22320242017
Millerville2120241966
Beatrice2120211966
Lanett2020241966
Odenville1820241996
Rock Chapel1820241995
Wedowee1820231996
Nixburg 21720242000
Sunny Eve1620241966
Greensboro1520241966
Valhermoso Spg 21520142014
Howard1420241966
Millry1420231970
Helicon1420241996
Greensport1220241966
Sprague1220241966
Swaim1120241966
Riderwood1120231966
Elamville1120241984
Vina1120231996
Gastonburg1120241996
Warrior Std1020241966

Wood Thrush Population Trend in Other States

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

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