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

Common Yellowthroat Population Trend in Vermont

All statesForest birds

Common Yellowthroat in Vermont has increased: up 37% on the route-weighted index since 1968.

+37%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 →
26Routes 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 VermontNotable 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 Vermont. See the full index history below.

Common Yellowthroat Population Forecast in Vermont

If the recent trend holds, Common Yellowthroat in Vermont is projected to stay roughly flat through 2030, near 23 (95% range 16–30). A 5-year backtest shows a typical error of ±10.9%, with 100% of held-out values landing inside the 95% band.

-8%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 →
16–3095% 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 →
±10.9%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 Vermont is projected to stay roughly flat through 2030, near 23 (95% range 16–30). A 5-year backtest shows a typical error of ±10.9%, 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 →
2026231630
2027231630
2028231630
2029231630
2030231630

Common Yellowthroat Survey Routes in Vermont

Routes recording Common Yellowthroat in Vermont.
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 →
Fletcher3920251969
Greensboro3820251967
Middlesex3520251968
Stowe3520241988
Waterville3319801967
Hinesburg3319941966
North Pownal3220251966
Landgrove3220251966
Hardwick3020241966
Northfld Fls2820251980
East Calais2820251966
W Rutland2720251966
Bristol2720251995
East Haven2620251966
Shaftsbury2520251966
S Wallingfrd2420221966
Gaysville2320251966
Marlboro2220251966
St Johnsbury2220251970
Stratton2020251966
Newbury 22020232005
Newbury1320041986
S Reading1120241966
Post Mills1020251966
Colchester920251986

Common Yellowthroat Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvirginiawashingtonwest-virginiawisconsinwyoming

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