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

American Coot Population Trend in Oregon

All statesWetland birds

American Coot in Oregon has surged: up 687% on the route-weighted index since 1971.

+687%Since 1971TrendPercent 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 →
43Routes 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 OregonNotable 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 surged in Oregon: up 687% on the route-weighted index since 1971.

American Coot Population Forecast in Oregon

If the recent trend holds, American Coot in Oregon is projected to fall about 27% by 2029 — from 4.9 in 2024 to a central estimate of 3.6 (95% range 0.00–18). A 5-year backtest shows a typical error of ±476%, with 100% of held-out values landing inside the 95% band.

-27%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 →
3.6Projected 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 →
0.00–1895% 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 →
±476%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 Oregon is projected to fall about 27% by 2029 — from 4.9 in 2024 to a central estimate of 3.6 (95% range 0.00–18). A 5-year backtest shows a typical error of ±476%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20253.50.0018
20263.60.0018
20273.60.0018
20283.60.0018
20293.60.0018

American Coot Survey Routes in Oregon

Routes recording American Coot in Oregon.
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 →
Warner Vally21420241993
Fish Lake12120241972
Catlow Rim11020241995
Blizzard Gap820241984
Monument719931993
Bly620011992
Lone Rock520151998
Malheur Nwr519981986
Madras420221998
Donnelly419951994
Barnes Val319851985
Elkton319761976
Battle Mtn319991988
Deschutes220242015
Dell Spring219831969
Fandango Can220172005
Joseph220171977
Princeton219851972
Unity220032000
Harney Lake220001995
Merrill220121994
Salem220102010
Glasgow220082008
Davis Lake220242023
Three Forks120112011

American Coot Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutfloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniasouth-dakotatennesseetexasutahvermontwashingtonwest-virginiawisconsinwyoming

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