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

American Goshawk In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGeneralists

American Goshawk in Southern Rockies / Colorado Plateau has fallen sharply: down 53% on the route-weighted index since 1975.

-53%Since 1975TrendPercent 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 →
70Routes 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 →
46YearsYears 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 American Goshawk in Southern Rockies / Colorado Plateau. See the full index history below.

American Goshawk In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, American Goshawk in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.05). A 5-year backtest shows a typical error of ±34.1%, 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 →
0.02Projected 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 →
0.00–0.0595% 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 →
±34.1%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, American Goshawk in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.05). A 5-year backtest shows a typical error of ±34.1%, 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 →
20250.020.000.05
20260.020.000.05
20270.020.000.05
20280.020.000.05
20290.020.000.05

Routes In Southern Rockies / Colorado Plateau

Routes recording American Goshawk 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 →
TarryallCOLORADO22014
Baxter PassCOLORADO22013
Bryce CanyonUTAH22024
Fox ParkWYOMING22000
House RockARIZONA11993
SawmillARIZONA12005
Dry ParkARIZONA12021
TsaileARIZONA12023
YampaCOLORADO11972
AspenCOLORADO11997
ParlinCOLORADO12015
FalfaCOLORADO12021
Wray GulchCOLORADO12005
Lost LakeCOLORADO12000
Red CliffCOLORADO12002
UncompahgreCOLORADO12006
CastletonCOLORADO12013
GuffeyCOLORADO12017
Dolores RivCOLORADO12000
Blackhead PkCOLORADO12021
Rio Grnds RsCOLORADO12006
Buffalo ParkCOLORADO12016
FlattopsCOLORADO12003
ThomasvilleCOLORADO12002
Guanella PasCOLORADO12012

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