BirdAnalyst
Species · BCR 16 · BBS 2026 Release · 1966–2025

Osprey In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauBirds of prey

Osprey in Southern Rockies / Colorado Plateau has surged: up 581% on the route-weighted index since 1993.

+581%Since 1993TrendPercent 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 →
38Routes 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 →
33YearsYears 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 Osprey in Southern Rockies / Colorado Plateau. See the full index history below.

Osprey In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Osprey in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2030, near 0.15 (95% range 0.11–0.19). A 5-year backtest shows a typical error of ±5.9%, with 100% of held-out values landing inside the 95% band.

+10%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 →
0.15Projected 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 →
0.11–0.1995% 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 →
±5.9%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, Osprey in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2030, near 0.15 (95% range 0.11–0.19). A 5-year backtest shows a typical error of ±5.9%, with 100% of held-out values landing inside the 95% band.19862030
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 →
20260.130.090.17
20270.140.100.18
20280.140.100.18
20290.140.100.18
20300.150.110.19

Routes In Southern Rockies / Colorado Plateau

Routes recording Osprey 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 →
KamasUTAH52025
Wray GulchCOLORADO22025
De BequeCOLORADO22025
Lake City 2COLORADO22025
Steamboat L.COLORADO22025
HannaUTAH22015
BicknellUTAH22025
Logan CanyonUTAH22016
Bryce CanyonUTAH22012
Fox ParkWYOMING22022
HarmonyCOLORADO12023
AspenCOLORADO12025
Lost LakeCOLORADO12019
TarryallCOLORADO12019
CortezCOLORADO11988
Rio Grnds RsCOLORADO12016
ThomasvilleCOLORADO12017
Groundhog RsCOLORADO12021
PiedraCOLORADO12015
Ragged Mtn.COLORADO12025
AngoraCOLORADO12022
Gold HillCOLORADO12006
Rifle FallsCOLORADO12025
Rollins PassCOLORADO12021
Cortez 2COLORADO12014

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