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Species · Pennsylvania · BBS 2026 Release · 1966–2025

Broad-winged Hawk Population Trend in Pennsylvania

All statesBirds of prey

Broad-winged Hawk in Pennsylvania has increased: up 26% on the route-weighted index since 1968.

+26%Since 1968TrendPercent 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 →
110Routes 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 →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Broad-winged 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 Broad-winged Hawk in Pennsylvania. See the full index history below.

Broad-winged Hawk Population Forecast in Pennsylvania

If the recent trend holds, Broad-winged Hawk in Pennsylvania is projected to stay roughly flat through 2030, near 0.21 (95% range 0.12–0.31). A 5-year backtest shows a typical error of ±17.5%, with 80% of held-out values landing inside the 95% band.

+10%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 →
0.21Projected 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 →
0.12–0.3195% 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 →
±17.5%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, Broad-winged Hawk in Pennsylvania is projected to stay roughly flat through 2030, near 0.21 (95% range 0.12–0.31). A 5-year backtest shows a typical error of ±17.5%, with 80% of held-out values landing inside the 95% band.19662030
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 →
20260.210.110.31
20270.210.110.31
20280.210.110.31
20290.210.110.31
20300.210.120.31

Broad-winged Hawk Survey Routes in Pennsylvania

Routes recording Broad-winged 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 →
Clover220001994
Akeley219731971
N Pine Grove220251984
Rasselas220221999
Mawr Glen220191984
Ralston219721972
Marsh Hill220191983
Waller220231971
Portersville219751975
Plesant Grov220151998
Kaylor220141971
Peru Mills220121968
Garrett220251984
Gatchelville219831975
Ltl Pine Cr220251996
Mill Run220241978
Espyville120071971
Harmonsburg120171981
Ferris Crnrs120241970
Whig Hill120231967
Teepleville120031969
Sigel120211981
Lynch120241970
N Washington120021968
Pottersdale120171969

Broad-winged Hawk Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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