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

Golden Eagle In Shortgrass Prairie

All regionsShortgrass PrairieGeneralists

Golden Eagle in Shortgrass Prairie has fallen sharply: down 66% on the route-weighted index since 1972.

-66%Since 1972TrendPercent 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 →
52Routes 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 →
52YearsYears 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 declinecomputed 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 fallen sharply in Shortgrass Prairie: down 66% on the route-weighted index since 1972.

Golden Eagle In Shortgrass Prairie Population Forecast

If the recent trend holds, Golden Eagle in Shortgrass Prairie is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.13). A 5-year backtest shows a typical error of ±77.2%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.04Projected 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 →
0.00–0.1395% 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 →
±77.2%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 Shortgrass Prairie is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.13). A 5-year backtest shows a typical error of ±77.2%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.040.000.13
20260.040.000.13
20270.040.000.13
20280.040.000.13
20290.040.000.13

Routes In Shortgrass Prairie

Routes recording Golden 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 →
GilpinCOLORADO32011
TrincheraCOLORADO32000
Mica ButteCOLORADO21986
Wildhorse LCOLORADO22011
EllicottCOLORADO21999
KarvalCOLORADO22014
FarleyNEW-MEXICO21999
LoganNEW-MEXICO21997
BriggsdaleCOLORADO11992
PinneoCOLORADO12010
KiowaCOLORADO12002
Last ChanceCOLORADO12014
AbarrCOLORADO12011
BoyeroCOLORADO11997
Two ButtesCOLORADO12013
HudsonCOLORADO11995
BethuneCOLORADO12007
EdisonCOLORADO12018
CrowleyCOLORADO12018
VillegreenCOLORADO12024
CampoCOLORADO12001
Kiowa 2COLORADO12022
Cone MtnCOLORADO12024
GroverCOLORADO12021
StonehamCOLORADO12019

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