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Species · Georgia · BBS 2026 Release · 1966–2025

Brown Thrasher Population Trend in Georgia

All statesForest birds

Brown Thrasher in Georgia has held roughly steady: down 7% on the route-weighted index since 1968.

-7%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 →
111Routes 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 Brown Thrasher Trends in GeorgiaNotable 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 Brown Thrasher in Georgia. See the full index history below.

Brown Thrasher Population Forecast in Georgia

If the recent trend holds, Brown Thrasher in Georgia is projected to stay roughly flat through 2030, near 7.5 (95% range 5.8–9.2). A 5-year backtest shows a typical error of ±7.7%, with 100% of held-out values landing inside the 95% band.

-3%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 →
7.5Projected 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 →
5.8–9.295% 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 →
±7.7%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, Brown Thrasher in Georgia is projected to stay roughly flat through 2030, near 7.5 (95% range 5.8–9.2). A 5-year backtest shows a typical error of ±7.7%, with 100% 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 →
20267.55.89.2
20277.55.89.2
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20307.55.89.2

Brown Thrasher Survey Routes in Georgia

Routes recording Brown Thrasher in Georgia.
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 →
Lincolnton2220171966
Fairplay2019911966
Rentz1920251977
Weber1820252006
Hiram1720181975
Hollonville1620031973
Stoney Point 21620252013
Ousley1520252015
Guyton1419931966
Linwood1420231970
Kite Lake1420252015
Stoney Point1420072007
Shannon1320191975
Pitts1320251977
Lincolnton 21320252018
Shiloh1320252012
Owensboro1320252010
Lakeview1320252006
Bowdon1220251973
Rutledge1220251975
Whitesburg1220251992
Candler1220252009
Fitzgerald1120251966
Newton1120251975
Stockbridge1120251975

Brown Thrasher Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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