BirdAnalyst
Species · Wisconsin · BBS 2026 Release · 1966–2025

Barred Owl Population Trend in Wisconsin

All statesBirds of prey

Barred Owl in Wisconsin has surged: up 457% on the route-weighted index since 1968.

+457%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 →
82Routes 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 Barred Owl 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 Barred Owl in Wisconsin. See the full index history below.

Barred Owl Population Forecast in Wisconsin

If the recent trend holds, Barred Owl in Wisconsin is projected to stay roughly flat through 2030, near 0.18 (95% range 0.03–0.32). A 5-year backtest shows a typical error of ±24.4%, with 100% of held-out values landing inside the 95% band.

-6%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 →
0.18Projected 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 →
0.03–0.3295% 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 →
±24.4%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, Barred Owl in Wisconsin is projected to stay roughly flat through 2030, near 0.18 (95% range 0.03–0.32). A 5-year backtest shows a typical error of ±24.4%, with 100% 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 →
20260.180.030.32
20270.180.030.32
20280.180.030.32
20290.180.030.32
20300.180.030.32

Barred Owl Survey Routes in Wisconsin

Routes recording Barred Owl 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 →
Cavour420252012
Loraine320211967
Mcnaughton320231980
Flambeau320162008
Bayfield220241973
Irma219741974
Crandon220091969
Amberg220191986
Washington I219781978
Esdaile220231966
Cochrane219861972
Gilmanton220251971
Hatfield219981984
Mather220101974
Wis Rapids220212021
Princeton220241980
Eden220011995
Chaffey120221981
Iron River120241969
Minong120191974
Grand View120231971
Shanagolden120251975
Montreal120231969
Land O Lakes120151974
Hudson120232009

Barred Owl Population Trend in Other States

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

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