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Species · Georgia · BBS 2026 Release · 1966–2025

Louisiana Waterthrush Population Trend in Georgia

All statesForest birds

Louisiana Waterthrush in Georgia has surged: up 107% on the route-weighted index since 1973.

+107%Since 1973TrendPercent 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 →
69Routes 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 →
54YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Louisiana Waterthrush 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Louisiana Waterthrush has surged in Georgia: up 107% on the route-weighted index since 1973.

Louisiana Waterthrush Population Forecast in Georgia

If the recent trend holds, Louisiana Waterthrush in Georgia is projected to fall about 23% by 2030 — from 0.39 in 2025 to a central estimate of 0.30 (95% range 0.15–0.46). A 5-year backtest shows a typical error of ±25.5%, with 80% of held-out values landing inside the 95% band.

-23%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 →
0.30Projected 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 →
0.15–0.4695% 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 →
±25.5%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, Louisiana Waterthrush in Georgia is projected to fall about 23% by 2030 — from 0.39 in 2025 to a central estimate of 0.30 (95% range 0.15–0.46). A 5-year backtest shows a typical error of ±25.5%, with 80% of held-out values landing inside the 95% band.19672030
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 →
20260.290.130.45
20270.290.140.45
20280.300.140.45
20290.300.140.46
20300.300.150.46

Louisiana Waterthrush Survey Routes in Georgia

Routes recording Louisiana Waterthrush 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 →
Henderson320241973
Washington320251984
Hawkinsville219981976
Maxeys220242003
Grovetown220131979
Sharon 2220252023
Rutledge220251997
Juliette220251994
Deepstep220211975
Union220232023
Carrs Station220212021
Rock Branch220252025
Lincolnton 2220252021
Whitesburg220251996
Piedmont Nwr120021992
Fowlstown119951967
Everett City119781978
Courthouse120221984
Cuthbert120141968
Guyton119841983
Coffee Co119861986
Wrightsville120171988
Forsyth120141995
Crest120131976
Ball Ground120212019

Louisiana Waterthrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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