BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

American Coot In Northern Rockies

All regionsNorthern RockiesWetland birds

American Coot in Northern Rockies has surged: up 104% on the route-weighted index since 1970.

+104%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 →
78Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Northern Rockies: up 104% on the route-weighted index since 1970.

American Coot In Northern Rockies Population Forecast

If the recent trend holds, American Coot in Northern Rockies is projected to rise about 44% by 2030 — from 0.84 in 2025 to a central estimate of 1.2 (95% range 0.21–2.2). A 5-year backtest shows a typical error of ±107.6%, with 100% of held-out values landing inside the 95% band.

+44%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 →
1.2Projected 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 →
0.21–2.295% 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 →
±107.6%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 Northern Rockies is projected to rise about 44% by 2030 — from 0.84 in 2025 to a central estimate of 1.2 (95% range 0.21–2.2). A 5-year backtest shows a typical error of ±107.6%, 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 →
20261.20.172.2
20271.20.182.2
20281.20.192.2
20291.20.202.2
20301.20.212.2

Routes In Northern Rockies

Routes recording American Coot in Northern Rockies.
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 2WYOMING802025
Neponset ResUTAH502018
RawlinsWYOMING501999
Hunter PeakWYOMING162010
Rock RiverWYOMING152022
NaplesIDAHO122025
Great DivideCOLORADO112015
ClarkWYOMING102025
KalispellMONTANA92018
Saleratus CrUTAH92018
MammothWYOMING92025
Lolo PassIDAHO82001
MonumentOREGON71993
Ne EntranceWYOMING72025
PolsonMONTANA62006
HarmonyWYOMING62014
Pablo Res.MONTANA52025
BaggsWYOMING52003
MadrasOREGON42022
DonnellyOREGON41995
Green RiverWYOMING41984
Savery 2WYOMING42024
RandolphUTAH32025
CurlewWASHINGTON31994
LaurierWASHINGTON32017

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