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

American Coot Population Trend in Idaho

All statesWetland birds

American Coot in Idaho has fallen sharply: down 62% on the route-weighted index since 1970.

-62%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 →
30Routes 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 →
56YearsYears 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 IdahoNotable 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 Idaho: down 62% on the route-weighted index since 1970.

American Coot Population Forecast in Idaho

If the recent trend holds, American Coot in Idaho is projected to fall about 26% by 2029 — from 1.6 in 2024 to a central estimate of 1.1 (95% range 0.00–3.8). A 5-year backtest shows a typical error of ±99.1%, with 100% of held-out values landing inside the 95% band.

-26%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 →
1.1Projected 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 →
0.00–3.895% 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 →
±99.1%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 Idaho is projected to fall about 26% by 2029 — from 1.6 in 2024 to a central estimate of 1.1 (95% range 0.00–3.8). A 5-year backtest shows a typical error of ±99.1%, 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 →
20251.20.003.9
20261.20.003.9
20271.20.003.9
20281.20.003.9
20291.10.003.8

American Coot Survey Routes in Idaho

Routes recording American Coot in Idaho.
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 →
Glenns Ferry5019691968
Naples2320241973
Kyle Canyon1319961996
Iron Springs1320241988
Lolo Pass820012000
Cabarton520231985
Blackft Res419991984
Springfield420141969
Daniels Res420171991
Bates320022002
Cedar Hill320241999
Cascade219731973
Acequia220031979
Sawtooth Cty219991999
Mivoden120041977
Gifford119951995
Baker120162007
Challis119811981
Dubois120041978
Blacks Creek120051971
Triangle120211985
Magic Mtn120221991
Henry119811981
Crane Creek120041994
Sunbeam120162016

American Coot Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutfloridageorgiaillinoisindianaiowakansaskentuckylouisianamichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-dakotatennesseetexasutahvermontwashingtonwest-virginiawisconsinwyoming

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