BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Bald Eagle In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGeneralists

Bald Eagle in Southern Rockies / Colorado Plateau has risen sharply: up 75% on the route-weighted index since 1991.

+75%Since 1991TrendPercent 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 →
36Routes 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 →
26YearsYears 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 →

Bald Eagle has risen sharply in Southern Rockies / Colorado Plateau: up 75% on the route-weighted index since 1991.

Bald Eagle In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Bald Eagle in Southern Rockies / Colorado Plateau is projected to fall about 58% by 2029 — from 0.14 in 2024 to a central estimate of 0.06 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±70.9%, with 60% of held-out values landing inside the 95% band.

-58%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 →
0.06Projected 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 →
0.00–0.1295% 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 →
±70.9%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 Southern Rockies / Colorado Plateau is projected to fall about 58% by 2029 — from 0.14 in 2024 to a central estimate of 0.06 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±70.9%, with 60% of held-out values landing inside the 95% band.19832029
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 →
20250.060.000.12
20260.060.000.12
20270.060.000.12
20280.060.000.12
20290.060.000.12

Routes In Southern Rockies / Colorado Plateau

Routes recording Bald Eagle in Southern Rockies / Colorado Plateau.
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 →
WarbonnetWYOMING52024
BufordCOLORADO32024
KamasUTAH32024
DoloresCOLORADO21984
WaldenCOLORADO22019
M Warner ResUTAH22014
Alton 2UTAH22022
BrookhurstWYOMING22011
House RockARIZONA11991
YampaCOLORADO12021
HarmonyCOLORADO12024
FalfaCOLORADO12023
Wray GulchCOLORADO12023
TarryallCOLORADO12022
CastletonCOLORADO12023
DoylevilleCOLORADO12016
GuffeyCOLORADO12024
CortezCOLORADO12002
Rio Grnds RsCOLORADO12019
De BequeCOLORADO12023
TincupCOLORADO12018
Groundhog RsCOLORADO12004
PowderhornCOLORADO12004
AnimasCOLORADO11999
South ForkCOLORADO12024

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