BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

American Coot In Great Basin

All regionsGreat BasinWetland birds

American Coot in Great Basin has risen sharply: up 55% on the route-weighted index since 1970.

+55%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 →
121Routes 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 →
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 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 risen sharply in Great Basin: up 55% on the route-weighted index since 1970.

American Coot In Great Basin Population Forecast

If the recent trend holds, American Coot in Great Basin is projected to rise about 17% by 2029 — from 4.4 in 2024 to a central estimate of 5.2 (95% range 0.00–15). A 5-year backtest shows a typical error of ±191%, with 100% of held-out values landing inside the 95% band.

+17%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 →
5.2Projected 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 →
0.00–1595% 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 →
±191%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 Great Basin is projected to rise about 17% by 2029 — from 4.4 in 2024 to a central estimate of 5.2 (95% range 0.00–15). A 5-year backtest shows a typical error of ±191%, 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 →
20255.10.0015
20265.10.0015
20275.20.0015
20285.20.0015
20295.20.0015

Routes In Great Basin

Routes recording American Coot in Great Basin.
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 →
DorrisCALIFORNIA2302019
Warner VallyOREGON2142024
Fish LakeOREGON1212024
Catlow RimOREGON1102024
LikelyCALIFORNIA922024
FallonNEVADA592023
Glenns FerryIDAHO501969
Virgin CreekNEVADA292018
Bear RiverUTAH202023
LeamingtonUTAH182017
Bald Mtn.NEVADA152024
CortezNEVADA142024
BrewsterWASHINGTON142018
Iron SpringsIDAHO132024
Kyle CanyonIDAHO131996
Gold HillUTAH102017
OthelloWASHINGTON91991
BentonCALIFORNIA82024
Blizzard GapOREGON82024
WapatoWASHINGTON81995
Crowder FlatCALIFORNIA72019
Majors PlaceNEVADA72016
TonasketWASHINGTON72018
GardnervilleNEVADA62011
BlyOREGON62001

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