BirdAnalyst
Species · BCR 17 · BBS 2026 Release · 1966–2025

Bald Eagle In Badlands and Prairies

All regionsBadlands and PrairiesBirds of prey

Bald Eagle in Badlands and Prairies has surged: up 330% on the route-weighted index since 1984.

+330%Since 1984TrendPercent 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 →
44Routes 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 →
29YearsYears 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 Bald Eagle in Badlands and Prairies. See the full index history below.

Bald Eagle In Badlands and Prairies Population Forecast

If the recent trend holds, Bald Eagle in Badlands and Prairies is projected to rise about 47% by 2030 — from 0.09 in 2025 to a central estimate of 0.13 (95% range 0.03–0.23). A 5-year backtest shows a typical error of ±33.6%, with 80% of held-out values landing inside the 95% band.

+47%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 →
0.13Projected 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 →
0.03–0.2395% 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 →
±33.6%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, Bald Eagle in Badlands and Prairies is projected to rise about 47% by 2030 — from 0.09 in 2025 to a central estimate of 0.13 (95% range 0.03–0.23). A 5-year backtest shows a typical error of ±33.6%, with 80% of held-out values landing inside the 95% band.19712030
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 →
20260.120.020.22
20270.120.020.22
20280.120.020.22
20290.130.030.22
20300.130.030.23

Routes In Badlands and Prairies

Routes recording Bald 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 →
ForsythMONTANA32023
HighwoodMONTANA22023
ZapNORTH-DAKOTA22024
Glen UllinNORTH-DAKOTA22017
DaytonWYOMING22023
KayceeWYOMING22025
Two DotMONTANA12024
ShawmutMONTANA12025
IngomarMONTANA12016
Reed PointMONTANA12025
St XavierMONTANA12010
BrandenbergMONTANA12019
PowdervilleMONTANA12017
AlbionMONTANA12024
Flatwillow 2MONTANA12022
St Xavier 2MONTANA12023
CusterMONTANA12022
Coleman CouleeMONTANA12018
Miles CityMONTANA12015
Roosevelt PkNORTH-DAKOTA12016
BentleyNORTH-DAKOTA12024
SolenNORTH-DAKOTA12019
RockyfordSOUTH-DAKOTA12023
Ft ThompsonSOUTH-DAKOTA12003
VolunteerSOUTH-DAKOTA12016

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