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

Common Yellowthroat Population Trend in Wisconsin

All statesForest birds

Common Yellowthroat in Wisconsin has risen sharply: up 50% on the route-weighted index since 1968.

+50%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 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 →

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 →

Common Yellowthroat has risen sharply in Wisconsin: up 50% on the route-weighted index since 1968.

Common Yellowthroat Population Forecast in Wisconsin

If the recent trend holds, Common Yellowthroat in Wisconsin is projected to stay roughly flat through 2029, 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.

+9%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 →
23Projected 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 →
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 2029, 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.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 →
2025232025
2026232025
2027232025
2028232025
2029232026

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
Gilman6320241966
Cumberland5020241966
Fall River4920241966
Kendall4620231967
Eden4520241966
Bayfield4420241967
Amnicon Falls4420241998
Flambeau4420241998
Briggsville4020241999
Merrill3920241966
Weirgor Springs3920241999
Annaton3920241998
Gilmanton3620241966
Exeland3420241968
Mather3420231966
Stratford3420241966
Pardeeville3420241967
Weyerhauser3320241966
Rib Lake3220241966
Hatfield3219981970
N Freedom3120241966
Paris3120241966
Trempealeau3020241966
Cadott3020241966

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 2026-05-22.