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

Brown Thrasher Population Trend in Georgia

All statesGeneralists

Brown Thrasher in Georgia has held roughly steady: down 10% on the route-weighted index since 1968.

-10%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 →
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 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 2029, near 7.5 (95% range 5.8–9.2). A 5-year backtest shows a typical error of ±7.9%, with 100% of held-out values landing inside the 95% band.

+1%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 →
7.5Projected 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 →
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 →
±7.9%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, Brown Thrasher in Georgia is projected to stay roughly flat through 2029, near 7.5 (95% range 5.8–9.2). A 5-year backtest shows a typical error of ±7.9%, with 100% 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 →
20257.55.89.3
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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 →
Athens2420241966
Lincolnton2220171966
Fairplay2019911966
Hiram1720181975
Dover1720241976
Candler1720242009
Hollonville1620031973
Rentz1620241977
Whitesburg1520241992
Shiloh1520242012
Guyton1419931966
Linwood1420231970
Rutledge1420241975
White Hill1420242005
Stoney Point1420072007
Stoney Point 21420242013
Fitzgerald1320241966
Shannon1320191975
Coffee Co1320241986
Ousley1320242015
Weber1320242006
Wrightsville1220241966
Henderson1220241973
Union1220232011
Bowdon1120241973

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 2026-05-22.