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Species · Wisconsin · BBS 2026 Release · 1966–2025

Yellow-throated Vireo Population Trend in Wisconsin

All statesForest birds

Yellow-throated Vireo in Wisconsin has surged: up 115% on the route-weighted index since 1968.

+115%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 →
96Routes 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 Yellow-throated Vireo 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 increasecomputed 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 →

Yellow-throated Vireo has surged in Wisconsin: up 115% on the route-weighted index since 1968.

Yellow-throated Vireo Population Forecast in Wisconsin

If the recent trend holds, Yellow-throated Vireo in Wisconsin is projected to stay roughly flat through 2030, near 1.9 (95% range 1.4–2.3). A 5-year backtest shows a typical error of ±12%, with 80% of held-out values landing inside the 95% band.

+3%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 →
1.9Projected 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 →
1.4–2.395% 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 →
±12%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, Yellow-throated Vireo in Wisconsin is projected to stay roughly flat through 2030, near 1.9 (95% range 1.4–2.3). A 5-year backtest shows a typical error of ±12%, with 80% 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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Yellow-throated Vireo Survey Routes in Wisconsin

Routes recording Yellow-throated Vireo 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 →
Bashaw1420251999
Amberg1220251980
Union Twp720251966
Loraine620251966
River Falls620251999
Dresser520251967
Gilman520251970
Wausaukee520251980
N Freedom520251966
Princeton520241966
Weirgor Springs520252004
Cumberland420251966
Trempealeau420251966
Mather420231966
Fall River420251969
N Andover420251971
Highland420241998
Mukwonago 2420252005
Grand View320251966
Couderay320251969
Exeland320251968
Cochrane320251967
Cadott320251966
Stevens Pt320231966
Elderon320231970

Yellow-throated Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginia

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