BirdAnalyst
Species · BCR 5 · BBS 2025 Release · 1966–2024

Golden Eagle In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Golden Eagle in Northern Pacific Rainforest has fallen sharply: down 74% on the route-weighted index since 1975.

-74%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 →
20Routes 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 →
38YearsYears 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 declinecomputed 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 →

Golden Eagle has fallen sharply in Northern Pacific Rainforest: down 74% on the route-weighted index since 1975.

Golden Eagle In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Golden Eagle in Northern Pacific Rainforest is projected to stay roughly flat through 2024, near 0.01 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±34.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2024TrendPercent 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 →
0.01Projected 2024 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0695% 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 →
±34.3%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 Northern Pacific Rainforest is projected to stay roughly flat through 2024, near 0.01 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±34.3%, with 100% of held-out values landing inside the 95% band.19682024
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 →
20200.020.000.07
20210.020.000.07
20220.010.000.07
20230.010.000.07
20240.010.000.06

Routes In Northern Pacific Rainforest

Routes recording Golden Eagle in Northern Pacific Rainforest.
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 →
YrekaCALIFORNIA42016
Sheep MtnALASKA21994
GazelleCALIFORNIA22001
Emigrant LkOREGON22001
Emigrant Lake 2OREGON22003
MolallaOREGON22018
Hurricane RgWASHINGTON22007
SkagwayALASKA12015
Horse CreekCALIFORNIA12019
HoneydewCALIFORNIA12006
HolmesCALIFORNIA12015
Rio DellCALIFORNIA12001
Shasta LakeCALIFORNIA12003
LongvaleCALIFORNIA12005
Junction CtyCALIFORNIA11994
Mt ShastaCALIFORNIA12007
Bodega BayCALIFORNIA11981
Hay ForkCALIFORNIA12004
South Fork MtnCALIFORNIA12014
Port AngelesWASHINGTON11985

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