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

Horned Lark Population Trend in Wisconsin

All statesGrassland birds

Horned Lark in Wisconsin has held roughly steady: down 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 →
79Routes 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 →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Horned Lark 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 Horned Lark in Wisconsin. See the full index history below.

Horned Lark Population Forecast in Wisconsin

If the recent trend holds, Horned Lark in Wisconsin is projected to rise about 39% by 2029 — from 3.5 in 2024 to a central estimate of 4.8 (95% range 2.2–7.5). A 5-year backtest shows a typical error of ±28.6%, with 100% of held-out values landing inside the 95% band.

+39%Change 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 →
4.8Projected 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 →
2.2–7.595% 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 →
±28.6%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, Horned Lark in Wisconsin is projected to rise about 39% by 2029 — from 3.5 in 2024 to a central estimate of 4.8 (95% range 2.2–7.5). A 5-year backtest shows a typical error of ±28.6%, 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 →
20254.82.27.5
20264.82.27.5
20274.82.27.5
20284.82.27.5
20294.82.27.5

Horned Lark Survey Routes in Wisconsin

Routes recording Horned Lark 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 →
Annaton4920241998
Kiel2520221998
Raymond2220241966
Hazel Green1820241966
Grimms1820211998
Pt Washingtn1720241966
Hudson1620241966
N Andover1320241967
Highland1320241998
Viroqua1120241966
Hebron1120241966
Esdaile820241966
Paris820241966
Beloit820231998
Rolling Grnd720231966
Fall River720241969
Beaver Dam720231966
Colby720241998
Gresham720241998
Pardeeville620241967
Brownsville620241966
Holland620241998
Weyerhauser520241966
Gilmanton520221966
Stratford520241966

Horned Lark Population Trend in Other States

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

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