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

Cooper's Hawk Population Trend in Oregon

All statesGeneralists

Cooper's Hawk in Oregon has declined: down 40% on the route-weighted index since 1974.

-40%Since 1974TrendPercent 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 StateSurvey 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 Cooper's Hawk 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 →

No notable trend signals for Cooper's Hawk in Oregon. See the full index history below.

Cooper's Hawk Population Forecast in Oregon

If the recent trend holds, Cooper's Hawk in Oregon is projected to stay roughly flat through 2029, near 0.09 (95% range 0.01–0.17). A 5-year backtest shows a typical error of ±16.2%, with 100% of held-out values landing inside the 95% band.

+0%Change 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 →
0.09Projected 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 →
0.01–0.1795% 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 →
±16.2%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, Cooper's Hawk in Oregon is projected to stay roughly flat through 2029, near 0.09 (95% range 0.01–0.17). A 5-year backtest shows a typical error of ±16.2%, with 100% of held-out values landing inside the 95% band.19712029
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 →
20250.080.000.17
20260.090.000.17
20270.090.000.17
20280.090.000.17
20290.090.010.17

Cooper's Hawk Survey Routes in Oregon

Routes recording Cooper's Hawk 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 →
Barnhouse320211998
Wizard Falls220082002
Days Creek219811971
Adrian220061992
Canby220192019
Unity219981996
Tualatin120161976
Shellrock120182010
Ordnance119791974
Albee120181992
Flora120221988
Imnaha120241999
Molalla120072007
Cool Camp119961987
Deschutes119781978
Ochoco119751975
Logdell120161992
Wickiup120242019
Bridgeport119911988
Nicolai Mtn.119981997
Scappoose120222021
Umpqua120231971
Winberry119751975
Wedderburn120181974
Derby119771971

Cooper's Hawk Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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