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Species · Wisconsin · BBS 2026 Release · 1966–2025

Golden-winged Warbler Population Trend in Wisconsin

All statesForest birds

Golden-winged Warbler in Wisconsin has increased: up 29% on the route-weighted index since 1968.

+29%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 →
65Routes 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 Golden-winged Warbler 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 Golden-winged Warbler in Wisconsin. See the full index history below.

Golden-winged Warbler Population Forecast in Wisconsin

If the recent trend holds, Golden-winged Warbler in Wisconsin is projected to fall about 42% by 2030 — from 1.1 in 2025 to a central estimate of 0.62 (95% range 0.08–1.2). A 5-year backtest shows a typical error of ±41.5%, with 40% of held-out values landing inside the 95% band.

-42%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 →
0.62Projected 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 →
0.08–1.295% 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 →
±41.5%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, Golden-winged Warbler in Wisconsin is projected to fall about 42% by 2030 — from 1.1 in 2025 to a central estimate of 0.62 (95% range 0.08–1.2). A 5-year backtest shows a typical error of ±41.5%, 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 →
20260.640.101.2
20270.640.101.2
20280.630.091.2
20290.630.091.2
20300.620.081.2

Golden-winged Warbler Survey Routes in Wisconsin

Routes recording Golden-winged Warbler 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 →
Weirgor Springs1320251999
Weyerhauser820241967
Bashaw820251998
Bayfield620251967
Cumberland620251966
Gilman620251966
Amberg620251980
Flambeau620251998
Pigeon Creek520242014
Mellen520252014
Merrill420251966
Mcnaughton420241970
Popple River420251967
Hollister420251967
Rolling Pr419751971
Rib Lake320251966
Grand View220251971
Loraine220251966
Couderay220191969
Irma220241967
Unity220251967
Stevens Pt220221968
Clintonville220051975
Stetsonville220251993
Chaffey120251967

Golden-winged Warbler Population Trend in Other States

connecticutgeorgiaillinoisindianakentuckymarylandmassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorknorth-carolinaohiopennsylvaniatennesseevermontvirginiawest-virginia

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