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

Dickcissel Population Trend in Wisconsin

All statesGrassland birds

Dickcissel in Wisconsin has fallen sharply: down 65% on the route-weighted index since 1968.

-65%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 →
86Routes 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 Dickcissel 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 →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Dickcissel has fallen sharply in Wisconsin: down 65% on the route-weighted index since 1968.

Dickcissel Population Forecast in Wisconsin

If the recent trend holds, Dickcissel in Wisconsin is projected to rise about 12% by 2029 — from 2.6 in 2024 to a central estimate of 2.9 (95% range 0.00–9.3). A 5-year backtest shows a typical error of ±44.6%, with 80% of held-out values landing inside the 95% band.

+12%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 →
2.9Projected 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 →
0.00–9.395% 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 →
±44.6%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, Dickcissel in Wisconsin is projected to rise about 12% by 2029 — from 2.6 in 2024 to a central estimate of 2.9 (95% range 0.00–9.3). A 5-year backtest shows a typical error of ±44.6%, with 80% 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 →
20252.90.009.3
20262.90.009.3
20272.90.009.3
20282.90.009.3
20292.90.009.3

Dickcissel Survey Routes in Wisconsin

Routes recording Dickcissel 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 →
Grimms4120211999
N Andover3220241967
Wiota2520241966
Stratford1720231968
Viroqua1720231966
Brownsville1720241966
Hazel Green1720241966
Colby1620232006
Prairie Du Chien1620242000
Wis Rapids1320231969
Annaton1220242000
Kendall1120231967
Pardeeville1120241967
New Lisbon920241967
Stetsonville920231998
Cadott820241966
Manawa820181966
Exeland720231968
Merrill720211969
N Freedom720241966
Iron River620232012
Loraine620181967
Trempealeau620241966
Unity620231967
Gresham620231998

Dickcissel Population Trend in Other States

alabamaarkansascoloradodelawaregeorgiaillinoisindianaiowakansaskentuckylouisianamarylandmichiganminnesotamississippimissourimontananebraskanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniasouth-carolinasouth-dakotatennesseetexasvirginiawest-virginiawyoming

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