BirdAnalyst
Species · BCR 33 · BBS 2025 Release · 1966–2024

American Coot In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsWetland birds

American Coot in Sonoran and Mojave Deserts has declined: down 34% on the route-weighted index since 1975.

-34%Since 1975TrendPercent 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 →
26Routes 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 →
51YearsYears 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 →

No notable trend signals for American Coot in Sonoran and Mojave Deserts. See the full index history below.

American Coot In Sonoran and Mojave Deserts Population Forecast

If the recent trend holds, American Coot in Sonoran and Mojave Deserts is projected to fall about 100% by 2029 — from 0.07 in 2024 to a central estimate of 0.00 (95% range 0.00–4.0). A 5-year backtest shows a typical error of ±190.6%, with 100% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–4.095% 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 →
±190.6%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 Sonoran and Mojave Deserts is projected to fall about 100% by 2029 — from 0.07 in 2024 to a central estimate of 0.00 (95% range 0.00–4.0). A 5-year backtest shows a typical error of ±190.6%, with 100% of held-out values landing inside the 95% band.19732029
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 →
20250.000.004.0
20260.000.004.0
20270.000.004.0
20280.000.004.0
20290.000.004.0

Routes In Sonoran and Mojave Deserts

Routes recording American Coot in Sonoran and Mojave Deserts.
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 →
ArabyARIZONA112023
Palo Verde 2ARIZONA52023
Willow Beach 2ARIZONA32018
Alamo RiverCALIFORNIA31992
Cibola LakeARIZONA22022
Casa GrandeARIZONA22022
Haiwee ResCALIFORNIA22002
LenwoodCALIFORNIA21978
Coachella CnCALIFORNIA21978
BlytheCALIFORNIA21976
Imperial DamCALIFORNIA22010
BrawleyCALIFORNIA22007
Ash MeadowsNEVADA22024
VicksburgARIZONA11988
LagunaARIZONA12011
DatelandARIZONA12001
CoolidgeARIZONA11979
Alamo Res.ARIZONA12016
Palo VerdeARIZONA12001
Calif CityCALIFORNIA11978
Parker DamCALIFORNIA12007
Palo VerdeCALIFORNIA12023
Lucerne ValCALIFORNIA11978
NilandCALIFORNIA12023
Lone PineCALIFORNIA11992

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