BirdAnalyst
Species · North Dakota · BBS 2025 Release · 1966–2024

Golden Eagle Population Trend in North Dakota

All statesGeneralists

Golden Eagle in North Dakota has declined: down 33% on the route-weighted index since 1979.

-33%Since 1979TrendPercent 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 →
12Routes 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 →
22YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Golden Eagle Trends in North DakotaNotable 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 North Dakota. See the full index history below.

Golden Eagle Population Forecast in North Dakota

If the recent trend holds, Golden Eagle in North Dakota is projected to stay roughly flat through 2028, near 0.03 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±30.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028TrendPercent 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 →
0.03Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0795% 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 →
±30.5%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 North Dakota is projected to stay roughly flat through 2028, near 0.03 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±30.5%, with 100% of held-out values landing inside the 95% band.19682028
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 →
20240.030.000.07
20250.030.000.07
20260.030.000.07
20270.030.000.07
20280.030.000.07

Golden Eagle Survey Routes in North Dakota

Routes recording Golden Eagle in North Dakota.
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 →
Gorham220041968
Zap220192002
Roosevelt Pk120141984
Cedar Creek120152015
Golva120081998
Bentley120232023
Carson119991999
Ft Yates119971997
Solen120152015
Tobacco119881969
Stanley119951995
Bowman120002000

Golden Eagle Population Trend in Other States

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