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Species · Wyoming · BBS 2025 Release · 1966–2024

American Coot Population Trend in Wyoming

All statesWetland birds

American Coot in Wyoming has risen sharply: up 71% on the route-weighted index since 1972.

+71%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 →
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 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 →

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 →

American Coot has risen sharply in Wyoming: up 71% on the route-weighted index since 1972.

American Coot Population Forecast in Wyoming

If the recent trend holds, American Coot in Wyoming is projected to rise about 134% by 2029 — from 0.35 in 2024 to a central estimate of 0.81 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±171.2%, with 100% of held-out values landing inside the 95% band.

+134%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 →
0.81Projected 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 →
0.00–1.995% 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 →
±171.2%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 rise about 134% by 2029 — from 0.35 in 2024 to a central estimate of 0.81 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±171.2%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.800.001.9
20260.810.001.9
20270.810.001.9
20280.810.001.9
20290.810.001.9

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 →
Rawlins5019991988
Hunter Peak1620101982
Carter 21520242018
Rock River1520221993
Sybille Cyn1420152014
Natrona1319921973
Dwyer1319921992
Caballa Crk1019971997
Brookhurst720191970
Glenrock619681968
Harmony620141989
Baggs520031995
Welch519961981
Green River419841978
Savery 2420242024
Seely 2320242001
Mammoth320241982
Moose320191976
Dayton320081980
Seedskadee320151994
Lamont320121987
Ne Entrance220211988
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 2026-05-22.