BirdAnalyst
Species · BCR 18 · BBS 2025 Release · 1966–2024

Bald Eagle In Shortgrass Prairie

All regionsShortgrass PrairieGeneralists

Bald Eagle in Shortgrass Prairie has declined: down 27% on the route-weighted index since 2002.

-27%Since 2002TrendPercent 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 →
14Routes 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 →
18YearsYears 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 Shortgrass Prairie. See the full index history below.

Bald Eagle In Shortgrass Prairie Population Forecast

If the recent trend holds, Bald Eagle in Shortgrass Prairie is projected to fall about 78% by 2029 — from 0.07 in 2024 to a central estimate of 0.02 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±110.6%, with 40% of held-out values landing inside the 95% band.

-78%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 →
0.02Projected 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 →
0.00–0.1195% 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 →
±110.6%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 Shortgrass Prairie is projected to fall about 78% by 2029 — from 0.07 in 2024 to a central estimate of 0.02 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±110.6%, with 40% of held-out values landing inside the 95% band.19702029
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 →
20250.020.000.12
20260.020.000.12
20270.020.000.11
20280.020.000.11
20290.020.000.11

Routes In Shortgrass Prairie

Routes recording Bald Eagle in Shortgrass Prairie.
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 →
LakinKANSAS41970
Wildhorse LCOLORADO32019
Arsenal 2COLORADO32024
NeegrandeCOLORADO22018
Last ChanceCOLORADO12013
HudsonCOLORADO12022
NunnCOLORADO12019
Fort MorganCOLORADO12021
JulesburgCOLORADO12019
EllicottCOLORADO12022
ArsenalCOLORADO12015
Murray LakeNEBRASKA12024
MaxwellNEW-MEXICO12024
YoderWYOMING12024

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