BirdAnalyst
Species · Wisconsin · BBS 2026 Release · 1966–2025

Common Yellowthroat Population Trend in Wisconsin

All statesForest birds

Common Yellowthroat in Wisconsin has increased: up 48% on the route-weighted index since 1968.

+48%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 →
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 Common Yellowthroat 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 Common Yellowthroat in Wisconsin. See the full index history below.

Common Yellowthroat Population Forecast in Wisconsin

If the recent trend holds, Common Yellowthroat in Wisconsin is projected to stay roughly flat through 2030, near 23 (95% range 20–26). A 5-year backtest shows a typical error of ±5.4%, with 100% 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 →
23Projected 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 →
20–2695% 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 →
±5.4%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, Common Yellowthroat in Wisconsin is projected to stay roughly flat through 2030, near 23 (95% range 20–26). A 5-year backtest shows a typical error of ±5.4%, with 100% 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 →
2026232025
2027232025
2028232025
2029232026
2030232026

Common Yellowthroat Survey Routes in Wisconsin

Routes recording Common Yellowthroat 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 →
Wis Rapids8220231966
Gilman6320251966
Kendall5320251967
Amnicon Falls5020251998
Weirgor Springs4920251999
Iron River4520251967
Stetsonville4320251990
Bashaw4120251998
Merrill4020251966
Bayfield3920251967
Phillips3820251966
Rib Lake3720251966
Eden3720251966
Loraine3620251966
Pardeeville3620251967
Mather3420231966
Annaton3420251998
Stratford3320251966
Cumberland3220251966
Hatfield3219981970
Omro 23220252002
Gilmanton3120251966
Trempealeau3120251966
Fall River3120251966
Highland3120251998

Common Yellowthroat Population Trend in Other States

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

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