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

American Goshawk Population Trend in Oregon

All statesGeneralists

American Goshawk in Oregon has fallen sharply: down 66% on the route-weighted index since 1971.

-66%Since 1971TrendPercent 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 →
35Routes 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 →
40YearsYears 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 OregonNotable 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 Oregon: down 66% on the route-weighted index since 1971.

American Goshawk Population Forecast in Oregon

If the recent trend holds, American Goshawk in Oregon is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±42.6%, 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 →
0.01Projected 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 →
0.00–0.0695% 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 →
±42.6%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 Oregon is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±42.6%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.020.000.07
20260.020.000.06
20270.020.000.06
20280.010.000.06
20290.010.000.06

American Goshawk Survey Routes in Oregon

Routes recording American Goshawk in Oregon.
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 →
Paunina320112007
Unity219991994
Eagle Creek220222007
Sisters220092009
Shellrock120001995
Albee119911973
Summit Pr120231987
Cool Camp119811968
Ochoco119801974
Wickiup120192016
Dell Spring119811981
Buchanan119851971
Derby119711971
Modoc Point119691969
Paisley120211999
Emigrant Lake 2120022002
Eagle Rock119711971
Mount Vernon120131986
Clearwater120111992
Elk Lake119821973
Silver Creek120082008
Bly120011990
Howard Mdws.119941994
Troy120231992
Barnhouse120231998

American Goshawk Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahomainemassachusettsmichiganminnesotamontananevadanew-hampshirenew-jerseynew-mexiconew-yorkpennsylvaniarhode-islandsouth-dakotautahvermontwashingtonwisconsinwyoming

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