BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

Golden Eagle In Great Basin

All regionsGreat BasinBirds of prey

Golden Eagle in Great Basin has held roughly steady: up 7% on the route-weighted index since 1971.

+7%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 →
173Routes 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 →

No notable trend signals for Golden Eagle in Great Basin. See the full index history below.

Golden Eagle In Great Basin Population Forecast

If the recent trend holds, Golden Eagle in Great Basin is projected to stay roughly flat through 2030, near 0.31 (95% range 0.17–0.46). A 5-year backtest shows a typical error of ±29.6%, with 80% of held-out values landing inside the 95% band.

-10%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 →
0.31Projected 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 →
0.17–0.4695% 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 →
±29.6%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, Golden Eagle in Great Basin is projected to stay roughly flat through 2030, near 0.31 (95% range 0.17–0.46). A 5-year backtest shows a typical error of ±29.6%, with 80% of held-out values landing inside the 95% band.19692030
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 →
20260.310.160.46
20270.310.160.46
20280.310.160.46
20290.310.160.46
20300.310.170.46

Routes In Great Basin

Routes recording Golden Eagle 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 →
JosephOREGON82025
KeltonUTAH61995
ImnahaOREGON52023
Fall River MillsCALIFORNIA42010
Sand PassNEVADA42021
Humboldt NfNEVADA42018
Malheur NwrOREGON41995
Gold HillUTAH42025
Iron GateCALIFORNIA32018
LeadoreIDAHO32024
DuboisIDAHO32024
VyaNEVADA31973
Calico SprNEVADA31974
GardnervilleNEVADA32011
JarbidgeNEVADA32006
Charleston ReservoirNEVADA32024
Chimney Res.NEVADA32025
Darroughs Hot SpgsNEVADA32018
AustinNEVADA32018
BlitzenOREGON31993
Trout CreekOREGON32025
Notch PeakUTAH32018
FairfieldUTAH32024
CliveUTAH32021
RavendaleCALIFORNIA22025

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