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

Red-eyed Vireo Population Trend in Vermont

All statesForest birds

Red-eyed Vireo in Vermont has surged: up 194% on the route-weighted index since 1968.

+194%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 Red-eyed 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 →

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 →

Red-eyed Vireo has surged in Vermont: up 194% on the route-weighted index since 1968.

Red-eyed Vireo Population Forecast in Vermont

If the recent trend holds, Red-eyed Vireo in Vermont is projected to fall about 22% by 2030 — from 53 in 2025 to a central estimate of 41 (95% range 29–52). A 5-year backtest shows a typical error of ±26.3%, with 20% of held-out values landing inside the 95% band.

-22%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 →
41Projected 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 →
29–5295% 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 →
±26.3%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, Red-eyed Vireo in Vermont is projected to fall about 22% by 2030 — from 53 in 2025 to a central estimate of 41 (95% range 29–52). A 5-year backtest shows a typical error of ±26.3%, with 20% 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 →
2026402851
2027402852
2028402952
2029402952
2030412952

Red-eyed Vireo Survey Routes in Vermont

Routes recording Red-eyed 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 →
Shaftsbury9420251966
Northfld Fls8720251980
Stowe8720241988
East Haven8220251966
Gaysville7920251966
Landgrove7720251966
Hardwick7520241966
Marlboro7320251966
Stratton7220251966
North Pownal6520251966
Middlesex5920251968
Waterville5319801968
S Reading5120241966
Greensboro5020251967
St Johnsbury4420251970
Bristol3920251995
Post Mills3520251966
S Wallingfrd3520221966
Hinesburg3019941966
East Calais2620251966
Newbury 22420232005
W Rutland2220251966
Fletcher2220251969
Newbury2120041986
Colchester1120251986

Red-eyed Vireo Population Trend in Other States

alabamaalaskaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvirginiawashingtonwest-virginiawisconsinwyoming

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