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

Sharp-shinned Hawk Population Trend in Wisconsin

All statesGeneralists

Sharp-shinned Hawk in Wisconsin has held roughly steady: down 5% on the route-weighted index since 1973.

-5%Since 1973TrendPercent 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 →
51Routes 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 Sharp-shinned 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 Sharp-shinned Hawk in Wisconsin. See the full index history below.

Sharp-shinned Hawk Population Forecast in Wisconsin

If the recent trend holds, Sharp-shinned Hawk in Wisconsin is projected to stay roughly flat through 2028, near 0.03 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±160.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028TrendPercent 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 →
0.03Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0895% 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 →
±160.3%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, Sharp-shinned Hawk in Wisconsin is projected to stay roughly flat through 2028, near 0.03 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±160.3%, with 100% of held-out values landing inside the 95% band.19692028
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 →
20240.030.000.08
20250.030.000.08
20260.030.000.08
20270.030.000.08
20280.030.000.08

Sharp-shinned Hawk Survey Routes in Wisconsin

Routes recording Sharp-shinned 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 →
Exeland220211985
Gilmanton220071987
Iron River120041977
Minong120121976
Grand View119971997
Bayfield120121986
Montreal120021997
Pigeon Creek120142014
Union Twp120061989
Loraine119981986
Cumberland119991975
Weyerhauser120122006
Gilman120061997
Phillips119901990
Rib Lake120161985
Merrill120072002
Irma120151986
Eagle River119941990
Popple River119941986
Crandon119741974
Hollister120101995
Amberg119851980
Wausaukee119991999
Washington I120042004
Esdaile119831983

Sharp-shinned Hawk Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawyoming

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