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

Yellow-throated Vireo Population Trend in Vermont

All statesForest birds

Yellow-throated Vireo in Vermont has edged up: up 22% on the route-weighted index since 1969.

+22%Since 1969TrendPercent 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 →
21Routes 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 →
53YearsYears 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 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 Yellow-throated Vireo in Vermont. See the full index history below.

Yellow-throated Vireo Population Forecast in Vermont

If the recent trend holds, Yellow-throated Vireo in Vermont is projected to stay roughly flat through 2030, near 0.26 (95% range 0.00–0.94). A 5-year backtest shows a typical error of ±33.6%, with 100% of held-out values landing inside the 95% band.

-6%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 →
0.26Projected 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 →
0.00–0.9495% 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 →
±33.6%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 Vermont is projected to stay roughly flat through 2030, near 0.26 (95% range 0.00–0.94). A 5-year backtest shows a typical error of ±33.6%, 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 →
20260.290.000.97
20270.280.000.96
20280.280.000.95
20290.270.000.95
20300.260.000.94

Yellow-throated Vireo Survey Routes in Vermont

Routes recording Yellow-throated Vireo 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 →
Shaftsbury420231967
North Pownal220251974
Bristol220252025
Marlboro119901990
Stratton120101973
Landgrove119831983
S Reading119831966
Gaysville120141977
Post Mills120101967
S Wallingfrd120221974
W Rutland120251967
Northfld Fls119881988
Middlesex119921979
East Calais119691969
Greensboro119691969
Fletcher120241983
Waterville119801979
Hinesburg119931977
Colchester120191986
Grand Isle119921967
Stowe119891989

Yellow-throated Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvirginiawest-virginiawisconsin

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