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

Red-eyed Vireo Population Trend in Maine

All statesForest birds

Red-eyed Vireo in Maine has surged: up 221% on the route-weighted index since 1968.

+221%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 →
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 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 221% 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 2029, near 38 (95% range 24–53). A 5-year backtest shows a typical error of ±7.8%, with 100% of held-out values landing inside the 95% band.

+1%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 →
38Projected 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 →
24–5395% 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 →
±7.8%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 2029, near 38 (95% range 24–53). A 5-year backtest shows a typical error of ±7.8%, 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 →
2025372352
2026382352
2027382353
2028382353
2029382453

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
Eastbrook6820241971
Cooper6720211975
Waite6619771977
Nesowadnehun6520211990
Seboomook Lk5920141973
Turner 25920242011
Andover5720212010
Medway5620181976
Washburn5620051979
Bowdoin Ctr5520211971
Benedicta5220221976
Ft Fairfield5120051993
St David5120051982
Cornville5120242012
Hermon5020191966
Deblois4920071966
Brownfield 24720242010
Brooks4620191977
Carrying Pl4520241979
Rome4520241996
Hudson4420161973
Reeds4220241983

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 2026-05-22.