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

Cooper's Hawk Population Trend in Wyoming

All statesGeneralists

Cooper's Hawk in Wyoming has fallen sharply: down 52% on the route-weighted index since 1982.

-52%Since 1982TrendPercent 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 →
34Routes 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 →
30YearsYears 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 WyomingNotable 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 Wyoming. See the full index history below.

Cooper's Hawk Population Forecast in Wyoming

If the recent trend holds, Cooper's Hawk in Wyoming 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 ±28.1%, 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 →
±28.1%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, Cooper's Hawk in Wyoming 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 ±28.1%, with 100% of held-out values landing inside the 95% band.19792029
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

Cooper's Hawk Survey Routes in Wyoming

Routes recording Cooper's Hawk 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 →
Basin220172017
Bill219991999
Walcott219991997
Otto120232023
Wyarno120022002
Yellowstone120212021
Sundance119951983
Nowood120042004
Fontenelle119981998
Seely 2120142014
Savery119931992
Mammoth119941994
Hunter Peak119921992
Moose120192013
Meeteetse120242024
Tensleep120132013
Dayton120132006
Seely119991999
Moskee120011985
Alpine119931979
Wilson120211980
Horse Creek120052005
Raven120222022
Soda Lake119991999
Big Sandy120222022

Cooper's Hawk Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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