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

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 →
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 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 2029, near 23 (95% range 15–30). A 5-year backtest shows a typical error of ±11.4%, with 100% of held-out values landing inside the 95% band.

+8%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 →
15–3095% 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 →
±11.4%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 Vermont is projected to stay roughly flat through 2029, near 23 (95% range 15–30). A 5-year backtest shows a typical error of ±11.4%, 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 →
2025231530
2026231530
2027231530
2028231530
2029231530

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 →
East Haven3620241966
Stowe3520241988
Waterville3319801967
Hinesburg3319941966
Hardwick3020241966
Shaftsbury2920241966
Landgrove2820241966
Middlesex2820241968
East Calais2520241966
S Wallingfrd2420221966
W Rutland2420241966
Greensboro2320241967
Fletcher2320241969
Stratton2220241966
Newbury 22020232005
Bristol1820181995
Marlboro1720241966
Gaysville1720211966
St Johnsbury1720241970
Northfld Fls1720211980
Post Mills1320241966
Newbury1320041986
S Reading1120241966
North Pownal920241966
Colchester420241986

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 2026-05-22.