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Species · Pennsylvania · BBS 2026 Release · 1966–2025

Cooper's Hawk Population Trend in Pennsylvania

All statesBirds of prey

Cooper's Hawk in Pennsylvania has surged: up 301% on the route-weighted index since 1969.

+301%Since 1969TrendPercent 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 →
108Routes 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 →
57YearsYears 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 PennsylvaniaNotable 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 Pennsylvania. See the full index history below.

Cooper's Hawk Population Forecast in Pennsylvania

If the recent trend holds, Cooper's Hawk in Pennsylvania is projected to stay roughly flat through 2030, near 0.20 (95% range 0.12–0.27). A 5-year backtest shows a typical error of ±18.1%, with 80% of held-out values landing inside the 95% band.

+1%Change by 2030TrendPercent 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 →
0.20Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.12–0.2795% 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 →
±18.1%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 Pennsylvania is projected to stay roughly flat through 2030, near 0.20 (95% range 0.12–0.27). A 5-year backtest shows a typical error of ±18.1%, with 80% of held-out values landing inside the 95% band.19672030
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 →
20260.180.110.26
20270.190.110.26
20280.190.120.27
20290.190.120.27
20300.200.120.27

Cooper's Hawk Survey Routes in Pennsylvania

Routes recording Cooper's Hawk in Pennsylvania.
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 →
Clearfield920222001
Brunnerville 2320212013
Lynch220151985
Ramsey220252014
Arnot220252025
Waller220121982
Greentown220111976
Kittanning220241972
Geeseytown220212009
Middletown220231997
Duboistown219921992
Brick Tavern220222011
Bendersville220162006
Jacobus220152006
Slippery Rk119801977
Espyville120241994
Clover120132001
Harmonsburg120191997
Ferris Crnrs120251986
Whig Hill120141985
Teepleville120252004
Sigel120222004
N Washington120241982
N Pine Grove120111995
Betula120171988

Cooper's Hawk Population Trend in Other States

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

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.