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

Red-eyed Vireo Population Trend in Maine

All statesForest birds

Red-eyed Vireo in Maine has surged: up 248% on the route-weighted index since 1968.

+248%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 →
78Routes 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 MaineNotable 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 Maine: up 248% on the route-weighted index since 1968.

Red-eyed Vireo Population Forecast in Maine

If the recent trend holds, Red-eyed Vireo in Maine is projected to stay roughly flat through 2030, near 39 (95% range 24–54). A 5-year backtest shows a typical error of ±7.5%, with 100% of held-out values landing inside the 95% band.

-9%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 →
39Projected 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 →
24–5495% 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 →
±7.5%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 Maine is projected to stay roughly flat through 2030, near 39 (95% range 24–54). A 5-year backtest shows a typical error of ±7.5%, 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 →
2026382353
2027382453
2028392453
2029392453
2030392454

Red-eyed Vireo Survey Routes in Maine

Routes recording Red-eyed Vireo in Maine.
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 →
Northfield12419811976
Ludlow7419981968
Otisfield Gr7020151966
Cooper6720211975
Waite6619771977
Nesowadnehun6520211990
Turner 26020252011
Seboomook Lk5920141973
Andover5720212010
Greenwood5620251966
Washburn5620051979
Bowdoin Ctr5520211971
Medway5420251976
Carrying Pl5320251979
Benedicta5220221976
Ft Fairfield5120051993
St David5120051982
Brooks5020211977
Eastbrook5020251971
Winn5020251969
Deblois4920071966
Hermon4720211966
Wilson Mills4520251983
Rome4520241996
Hudson4420161973

Red-eyed Vireo Population Trend in Other States

alabamaalaskaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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