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

American Goldfinch Population Trend in Wisconsin

All statesGeneralists

American Goldfinch in Wisconsin has edged down: down 14% on the route-weighted index since 1968.

-14%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 →
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 American Goldfinch 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 Goldfinch in Wisconsin. See the full index history below.

American Goldfinch Population Forecast in Wisconsin

If the recent trend holds, American Goldfinch in Wisconsin is projected to rise about 40% by 2029 — from 13 in 2024 to a central estimate of 18 (95% range 10–26). A 5-year backtest shows a typical error of ±87.6%, with 0% of held-out values landing inside the 95% band.

+40%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 →
18Projected 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 →
10–2695% 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 →
±87.6%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, American Goldfinch in Wisconsin is projected to rise about 40% by 2029 — from 13 in 2024 to a central estimate of 18 (95% range 10–26). A 5-year backtest shows a typical error of ±87.6%, with 0% 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 →
2025181026
2026181026
2027181026
2028181026
2029181026

American Goldfinch Survey Routes in Wisconsin

Routes recording American Goldfinch 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 →
Omro4520011966
Mukwonago4220041998
Manitowoc3920241966
Trempealeau3520241966
Beloit3220241998
Highland3120241998
Mukwonago 23020242005
Paris2920241966
Cumberland2720241966
Oconto Falls2520231968
Hazel Green2520241966
New Lisbon2420241967
River Falls2420241998
Gresham2420241998
Dresser2220241966
Stratford2220241966
Wiota2220241966
Meridean2220241998
Grimms2220211998
Bayfield2120241967
Kendall2120231967
Irma1920241967
Viroqua1920241966
Fall River1920241966
Wis Rapids1820231966

American Goldfinch Population Trend in Other States

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

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