BirdAnalyst
Species · Utah · BBS 2025 Release · 1966–2024

American Goshawk Population Trend in Utah

All statesGeneralists

American Goshawk in Utah has collapsed: down 80% on the route-weighted index since 1981.

-80%Since 1981TrendPercent 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 →
19Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
24YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable American Goshawk Trends in UtahNotable 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 →

American Goshawk has collapsed in Utah: down 80% on the route-weighted index since 1981.

American Goshawk Population Forecast in Utah

If the recent trend holds, American Goshawk in Utah is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±201.8%, 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 →
0.00Projected 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 →
0.00–0.0895% 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 →
±201.8%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 Utah is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±201.8%, 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 →
20250.000.000.08
20260.000.000.08
20270.000.000.08
20280.000.000.08
20290.000.000.08

American Goshawk Survey Routes in Utah

Routes recording American Goshawk in Utah.
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 →
Bryce Canyon220242024
Beck119871969
Altonah119811975
Grizzly Rdge120151996
Lost Cr. Res120162016
Logan Canyon119971997
Red Spur Mtn.120182018
Navajo Lake120191986
Soapstone119971997
Moon Lake119991999
M Warner Res120222022
Skyline Driv119911989
Gooseberry120192016
Dixie Nf120171993
Ferron120192018
Alton119991999
Hardware Ranch120151996
Wasatch Nf120041988
Fish Lake Nf120072007

American Goshawk Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahomainemassachusettsmichiganminnesotamontananevadanew-hampshirenew-jerseynew-mexiconew-yorkoregonpennsylvaniarhode-islandsouth-dakotavermontwashingtonwisconsinwyoming

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