BirdAnalyst
Species · Oregon · BBS 2026 Release · 1966–2025

Bald Eagle Population Trend in Oregon

All statesBirds of prey

Bald Eagle in Oregon has surged: up 971% on the route-weighted index since 1975.

+971%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 →
63Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
50YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Bald Eagle Trends in OregonNotable 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 Bald Eagle in Oregon. See the full index history below.

Bald Eagle Population Forecast in Oregon

If the recent trend holds, Bald Eagle in Oregon is projected to fall about 40% by 2030 — from 0.61 in 2025 to a central estimate of 0.37 (95% range 0.23–0.51). A 5-year backtest shows a typical error of ±40.3%, with 0% of held-out values landing inside the 95% band.

-40%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 →
0.37Projected 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 →
0.23–0.5195% 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 →
±40.3%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, Bald Eagle in Oregon is projected to fall about 40% by 2030 — from 0.61 in 2025 to a central estimate of 0.37 (95% range 0.23–0.51). A 5-year backtest shows a typical error of ±40.3%, with 0% of held-out values landing inside the 95% band.19732030
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 →
20260.340.200.48
20270.350.200.49
20280.350.210.50
20290.360.220.50
20300.370.230.51

Bald Eagle Survey Routes in Oregon

Routes recording Bald Eagle in Oregon.
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 →
Madras1620252017
Modoc Point 21420252024
Joseph920251995
Crane820242021
Malheur Res.720232022
Adair420251999
Merrill420221995
Nicolai Mtn.320251994
Modoc Point320181973
Green320252025
Imnaha220242005
Wizard Falls220152000
Wedderburn220251982
Emigrant Lake 2220212002
Scio220192007
Sparta220252025
Troy220232014
Unity220242018
Salem220242008
Sisters220252006
Glasgow220252008
Davis Lake220242002
Tualatin120232006
Albee120252013
Riley Peak120111994

Bald Eagle Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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