BirdAnalyst
Species · Wyoming · BBS 2026 Release · 1966–2025

American Coot Population Trend in Wyoming

All statesWetland birds

American Coot in Wyoming has increased: up 30% on the route-weighted index since 1972.

+30%Since 1972TrendPercent 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 →
56Routes 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 →
55YearsYears 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 WyomingNotable 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 American Coot in Wyoming. See the full index history below.

American Coot Population Forecast in Wyoming

If the recent trend holds, American Coot in Wyoming is projected to fall about 27% by 2030 — from 1.2 in 2025 to a central estimate of 0.85 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±121.7%, with 100% of held-out values landing inside the 95% band.

-27%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 →
0.85Projected 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 →
0.00–1.995% 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 →
±121.7%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 Wyoming is projected to fall about 27% by 2030 — from 1.2 in 2025 to a central estimate of 0.85 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±121.7%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20260.840.001.9
20270.840.001.9
20280.840.001.9
20290.850.001.9
20300.850.001.9

American Coot Survey Routes in Wyoming

Routes recording American Coot in Wyoming.
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 →
Carter 28020252018
Rawlins5019991988
Hunter Peak1620101982
Rock River1520221993
Sybille Cyn1420152014
Natrona1319921973
Dwyer1319921992
Clark1020251990
Caballa Crk1019971997
Mammoth920251982
Ne Entrance720251988
Brookhurst720191970
Glenrock619681968
Harmony620141989
Baggs520031995
Welch519961981
Green River419841978
Savery 2420242024
Seely 2320242001
Moose320191976
Dayton320081980
Seedskadee320151994
Otto220042004
Wyarno220221974
Yellowstone220181987

American Coot Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutfloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-dakotatennesseetexasutahvermontwashingtonwest-virginiawisconsin

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