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

American Crow Population Trend in Wisconsin

All statesGeneralists

American Crow in Wisconsin has held roughly steady: up 8% on the route-weighted index since 1968.

+8%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 →
98Routes 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 American Crow 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 American Crow in Wisconsin. See the full index history below.

American Crow Population Forecast in Wisconsin

If the recent trend holds, American Crow in Wisconsin is projected to rise about 37% by 2030 — from 30 in 2025 to a central estimate of 41 (95% range 27–54). A 5-year backtest shows a typical error of ±39.1%, with 40% of held-out values landing inside the 95% band.

+37%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 →
41Projected 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 →
27–5495% 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 →
±39.1%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, American Crow in Wisconsin is projected to rise about 37% by 2030 — from 30 in 2025 to a central estimate of 41 (95% range 27–54). A 5-year backtest shows a typical error of ±39.1%, with 40% 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 →
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American Crow Survey Routes in Wisconsin

Routes recording American Crow 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 →
Omro12520011966
Iron River9720251967
Meridean8220251998
Wis Rapids7320231966
Princeton7020241966
Holway6819891967
New Lisbon6620251967
Gilman6120251966
Stevens Pt6120231966
Washington I5920251967
N Freedom5920251966
Dresser5720251966
Pt Washingtn5720241966
Loraine5220251966
Kendall5020251967
Trempealeau4920251966
River Falls4820251998
Gresham4820251998
Weyerhauser4720251966
Unity4620251967
Beaver Dam4620231966
Briggsville4420251999
Mukwonago 24420252005
Cochrane4320251966
Beloit4220251998

American Crow Population Trend in Other States

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

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