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Species · Georgia · BBS 2025 Release · 1966–2024

Common Gallinule Population Trend in Georgia

All statesWetland birds

Common Gallinule in Georgia has edged down: down 15% on the route-weighted index since 1976.

-15%Since 1976TrendPercent 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 →
19Routes 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 →
37YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Gallinule 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 Common Gallinule in Georgia. See the full index history below.

Common Gallinule Population Forecast in Georgia

If the recent trend holds, Common Gallinule in Georgia is projected to fall about 60% by 2029 — from 0.14 in 2024 to a central estimate of 0.06 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±51.4%, with 100% of held-out values landing inside the 95% band.

-60%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 →
0.06Projected 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 →
0.00–0.1995% 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 →
±51.4%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, Common Gallinule in Georgia is projected to fall about 60% by 2029 — from 0.14 in 2024 to a central estimate of 0.06 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±51.4%, 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 →
20250.060.000.19
20260.060.000.19
20270.060.000.19
20280.060.000.19
20290.060.000.19

Common Gallinule Survey Routes in Georgia

Routes recording Common Gallinule 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 →
Ousley320242015
White Hill320242024
Newton220231976
Dover220002000
Shiloh220222012
Darien120171973
Baxley120162016
Fitzgerald120232005
Everett City119921988
Hawkinsville119861966
Nashville120232023
Coffee Co120242024
Doles119961996
Jacksonboro120242014
Woodbine120242021
Union120232017
Millen120142014
Boston120152014
Pineora120012001

Common Gallinule Population Trend in Other States

alabamaarizonaarkansascaliforniaconnecticutdelawarefloridaillinoisindianakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippinevadanew-jerseynew-yorknorth-carolinaohiopennsylvaniasouth-carolinatennesseetexasutahvermontwisconsin

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