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

American Coot Population Trend in Colorado

All statesWetland birds

American Coot in Colorado has held roughly steady: down 7% on the route-weighted index since 1970.

-7%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 →
52Routes 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 ColoradoNotable 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 Colorado. See the full index history below.

American Coot Population Forecast in Colorado

If the recent trend holds, American Coot in Colorado is projected to rise about 46% by 2029 — from 0.66 in 2024 to a central estimate of 0.96 (95% range 0.00–2.0). A 5-year backtest shows a typical error of ±67.6%, with 100% of held-out values landing inside the 95% band.

+46%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 →
0.96Projected 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 →
0.00–2.095% 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 →
±67.6%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 Colorado is projected to rise about 46% by 2029 — from 0.66 in 2024 to a central estimate of 0.96 (95% range 0.00–2.0). A 5-year backtest shows a typical error of ±67.6%, 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 →
20250.940.002.0
20260.950.002.0
20270.950.002.0
20280.960.002.0
20290.960.002.0

American Coot Survey Routes in Colorado

Routes recording American Coot in Colorado.
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 →
Guffey5120222015
Pagosa Spgs3419821969
Rio Grnds Rs1620241991
Mcphee Res.1620241997
Piedra1520241992
Wildhorse L1320151998
Piceance Basin1220061998
Great Divide1120152015
Dinosaur820241995
Groundhog Rs619931993
Angora620092005
Ludlow620142014
Walden520211992
Cortez520081988
Cortez 2420172009
Tarryall420092007
Yellowjacket Pass420241998
Moffat319951993
Dolores319871968
Alamosa320241988
Karval320152015
Haswell319961994
Kiowa220091970
Lamar220212021
Waverly219911991

American Coot Population Trend in Other States

alabamaarizonaarkansascaliforniaconnecticutfloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-dakotatennesseetexasutahvermontwashingtonwest-virginiawisconsinwyoming

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