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

American Coot Population Trend in Wisconsin

All statesWetland birds

American Coot in Wisconsin has collapsed: down 85% on the route-weighted index since 1969.

-85%Since 1969TrendPercent 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 →
27Routes 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 →
39YearsYears 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 WisconsinNotable 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 collapsed in Wisconsin: down 85% on the route-weighted index since 1969.

American Coot Population Forecast in Wisconsin

If the recent trend holds, American Coot in Wisconsin is projected to stay roughly flat through 2024, near 0.00 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±146%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2024TrendPercent 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 2024 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1795% 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 →
±146%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 Wisconsin is projected to stay roughly flat through 2024, near 0.00 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±146%, with 100% of held-out values landing inside the 95% band.19672024
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 →
20200.000.000.17
20210.000.000.17
20220.000.000.17
20230.000.000.17
20240.000.000.17

American Coot Survey Routes in Wisconsin

Routes recording American Coot in Wisconsin.
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 →
Oconto Falls519981979
Omro 2420022002
Rolling Pr319751973
Eden319731967
Dresser220131984
Loraine219791969
Gilman219811981
Esdaile219771967
Unity220082008
Casco220022002
Pardeeville219941994
Beaver Dam219891969
Raymond219741969
Hudson120011968
Rib Lake120142014
Washington I119711971
Mather120022002
Wis Rapids119811981
Manawa120191973
Omro119931969
Manitowoc120102010
Flambeau120092009
Fall River120041967
Grimms119991999
Pt Washingtn120061978

American Coot Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutfloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-dakotatennesseetexasutahvermontwashingtonwest-virginiawyoming

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