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

American Coot Population Trend in Alabama

All statesWetland birds

American Coot in Alabama has fallen sharply: down 72% on the route-weighted index since 1970.

-72%Since 1970TrendPercent 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 →
14Routes 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 →
23YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable American Coot 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 →

long arc declinecomputed 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 →

American Coot has fallen sharply in Alabama: down 72% on the route-weighted index since 1970.

American Coot Population Forecast in Alabama

If the recent trend holds, American Coot in Alabama is projected to stay roughly flat through 2022, near 0.00 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±131.8%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2022TrendPercent 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 →
0.00Projected 2022 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0995% 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 →
±131.8%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, American Coot in Alabama is projected to stay roughly flat through 2022, near 0.00 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±131.8%, with 100% of held-out values landing inside the 95% band.19662022
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 →
20180.000.000.09
20190.000.000.09
20200.000.000.09
20210.000.000.09
20220.000.000.09

American Coot Survey Routes in Alabama

Routes recording American Coot 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 →
Alabama Pt419721966
Greensboro419961967
Valhermoso Spgs219981973
Odenville220061996
Wheeler Dam120011999
Dauphin Is119881984
Brooksville119971997
Blocton119711971
Birmingham119761971
Dauphin Is 2119991999
Smyer Lake119701970
Guntersville120171997
Oneonta120002000
Kymulga120032003

American Coot Population Trend in Other States

arizonaarkansascaliforniacoloradoconnecticutfloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-dakotatennesseetexasutahvermontwashingtonwest-virginiawisconsinwyoming

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