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

American Goshawk Population Trend in Wyoming

All statesGeneralists

American Goshawk in Wyoming has fallen sharply: down 53% on the route-weighted index since 1979.

-53%Since 1979TrendPercent 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 →
26Routes 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 →
37YearsYears 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 WyomingNotable 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 fallen sharply in Wyoming: down 53% on the route-weighted index since 1979.

American Goshawk Population Forecast in Wyoming

If the recent trend holds, American Goshawk in Wyoming is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±51.4%, with 80% 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 →
0.00–0.0895% 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 →
±51.4%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 Wyoming is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±51.4%, with 80% of held-out values landing inside the 95% band.19772029
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 →
20250.030.000.08
20260.030.000.08
20270.020.000.08
20280.020.000.08
20290.020.000.08

American Goshawk Survey Routes in Wyoming

Routes recording American Goshawk in Wyoming.
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 →
Gvnt Valley220042003
Alpine220121980
Wilson219851981
Green River219811977
Fox Park220001999
Prior Flats120212021
Sundance120241977
Colter Bay119991999
Riverside120032000
Buford120182018
Mammoth120012001
Hunter Peak120171988
Moose119931993
Crazy Woman120101982
Moskee120011994
Horse Creek119821982
Colter Bay 2120212021
Soda Lake119841980
Big Sandy120082008
Fiddler Lk120211982
Leo120022002
Fletcher Pk120061984
Diamondville119791979
Rock Springs119781978
Ryan Park120221993

American Goshawk Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahomainemassachusettsmichiganminnesotamontananevadanew-hampshirenew-jerseynew-mexiconew-yorkoregonpennsylvaniarhode-islandsouth-dakotautahvermontwashingtonwisconsin

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