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

Red-eyed Vireo Population Trend in Vermont

All statesForest birds

Red-eyed Vireo in Vermont has surged: up 180% on the route-weighted index since 1968.

+180%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 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 180% 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 25% by 2029 — from 53 in 2024 to a central estimate of 39 (95% range 28–51). A 5-year backtest shows a typical error of ±19.9%, with 40% of held-out values landing inside the 95% band.

-25%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 →
39Projected 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 →
28–5195% 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 →
±19.9%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, Red-eyed Vireo in Vermont is projected to fall about 25% by 2029 — from 53 in 2024 to a central estimate of 39 (95% range 28–51). A 5-year backtest shows a typical error of ±19.9%, with 40% 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 →
2025382750
2026392850
2027392850
2028392850
2029392851

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 →
Stratton9720241966
Shaftsbury9120241966
Stowe8720241988
East Haven7620241966
Hardwick7520241966
Marlboro7120241966
Landgrove6720241966
Middlesex6520241968
East Calais5920241966
Post Mills5620241966
St Johnsbury5420241970
Waterville5319801968
S Reading5120241966
S Wallingfrd3520221966
Northfld Fls3320211980
Fletcher3020241969
Hinesburg3019941966
Greensboro2720241967
W Rutland2620241966
Gaysville2420211966
Newbury 22420232005
Newbury2120041986
Bristol2120181995
Grand Isle820241967
Colchester520241986

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 2026-05-22.