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

Red-shouldered Hawk Population Trend in Wisconsin

All statesGeneralists

Red-shouldered Hawk in Wisconsin has edged up: up 16% on the route-weighted index since 1968.

+16%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 →
43Routes 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 →
52YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Red-shouldered Hawk Trends in WisconsinNotable 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 Red-shouldered Hawk in Wisconsin. See the full index history below.

Red-shouldered Hawk Population Forecast in Wisconsin

If the recent trend holds, Red-shouldered Hawk in Wisconsin is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±59.7%, 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 →
0.04Projected 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 →
0.00–0.0995% 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 →
±59.7%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, Red-shouldered Hawk in Wisconsin is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±59.7%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20250.040.000.09
20260.040.000.09
20270.040.000.09
20280.040.000.09
20290.040.000.09

Red-shouldered Hawk Survey Routes in Wisconsin

Routes recording Red-shouldered Hawk in Wisconsin.
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 →
Mather420231970
Bayfield220081994
Montreal219741974
Stevens Pt220172017
Grand View119991976
Shanagolden119691969
Hudson119751975
Dresser120131967
Union Twp120131978
Loraine120181980
Cumberland120171996
Pigeon Creek120132013
Exeland120011999
Phillips120042004
Rib Lake120062006
Eagle River119961993
Hollister119801971
Wausaukee120132005
Esdaile119741974
Cochrane119681967
Gilmanton119751966
Cadott120191997
Wis Rapids119971997
Saxeville120241992
Manawa120071979

Red-shouldered Hawk Population Trend in Other States

alabamaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawashingtonwest-virginia

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