BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Golden Eagle In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Golden Eagle in Badlands and Prairies has surged: up 99% on the route-weighted index since 1970.

+99%Since 1970TrendPercent 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 →
102Routes 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 →

long arc increasecomputed 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 surged in Badlands and Prairies: up 99% on the route-weighted index since 1970.

Golden Eagle In Badlands and Prairies Population Forecast

If the recent trend holds, Golden Eagle in Badlands and Prairies is projected to stay roughly flat through 2029, near 0.28 (95% range 0.10–0.45). A 5-year backtest shows a typical error of ±19.3%, with 100% of held-out values landing inside the 95% band.

+8%Change by 2029TrendPercent 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 →
0.28Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.10–0.4595% 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 →
±19.3%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 Badlands and Prairies is projected to stay roughly flat through 2029, near 0.28 (95% range 0.10–0.45). A 5-year backtest shows a typical error of ±19.3%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.270.100.45
20260.270.100.45
20270.280.100.45
20280.280.100.45
20290.280.100.45

Routes In Badlands and Prairies

Routes recording Golden Eagle in Badlands and Prairies.
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 →
NatronaWYOMING61992
Soda WellWYOMING52023
GlenrockWYOMING41976
JordanMONTANA32023
Miles CityMONTANA32023
Wheat BasinMONTANA32019
HighlightWYOMING32007
BucknumWYOMING32018
HampshireWYOMING32022
SavageMONTANA21995
IngomarMONTANA22024
St XavierMONTANA22006
PowdervilleMONTANA22022
Jordan SouthMONTANA22024
RoundupMONTANA22018
ZapNORTH-DAKOTA22019
GorhamNORTH-DAKOTA22004
OwankaSOUTH-DAKOTA22001
MaurineSOUTH-DAKOTA22024
WyarnoWYOMING22019
DaytonWYOMING22021
RecluseWYOMING22024
SeelyWYOMING21993
Teapot DomeWYOMING21987
MayoworthWYOMING22011

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