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

Golden Eagle In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsGeneralists

Golden Eagle in Sonoran and Mojave Deserts has declined: down 43% on the route-weighted index since 1973.

-43%Since 1973TrendPercent 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 →
25Routes 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 →
39YearsYears 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 Golden Eagle in Sonoran and Mojave Deserts. See the full index history below.

Golden Eagle In Sonoran and Mojave Deserts Population Forecast

If the recent trend holds, Golden Eagle in Sonoran and Mojave Deserts is projected to stay roughly flat through 2026, near 0.04 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±75.2%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2026TrendPercent 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 →
0.04Projected 2026 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1495% 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 →
±75.2%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, Golden Eagle in Sonoran and Mojave Deserts is projected to stay roughly flat through 2026, near 0.04 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±75.2%, with 100% of held-out values landing inside the 95% band.19692026
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 →
20220.040.000.14
20230.040.000.14
20240.040.000.14
20250.040.000.14
20260.040.000.14

Routes In Sonoran and Mojave Deserts

Routes recording Golden Eagle 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 →
TecopaCALIFORNIA31998
DarwinCALIFORNIA21999
Lucerne ValCALIFORNIA21996
CimaCALIFORNIA21983
BeattyNEVADA22017
NelsonNEVADA22019
RivieraARIZONA12019
Alamo Res.ARIZONA11995
Willow BeachARIZONA11990
Casa GrandeARIZONA11994
Willow Beach 2ARIZONA12018
UbehebeCALIFORNIA11999
Haiwee ResCALIFORNIA11996
OnyxCALIFORNIA11993
GoldstoneCALIFORNIA11994
Willow SpgsCALIFORNIA11969
Anza BorregoCALIFORNIA12019
Eureka ValCALIFORNIA12014
InyokernCALIFORNIA12017
IvanpahCALIFORNIA12008
TronaCALIFORNIA11977
Lone PineCALIFORNIA12004
Kelso ValleyCALIFORNIA12007
Greenwater VCALIFORNIA11978
Silver Peak 2NEVADA12021

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