BirdAnalyst
Species · BCR 28 · BBS 2026 Release · 1966–2025

Red-eyed Vireo In Appalachian Mountains

All regionsAppalachian MountainsForest birds

Red-eyed Vireo in Appalachian Mountains has surged: up 169% on the route-weighted index since 1968.

+169%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 →
406Routes In RegionSurvey 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 SignalsNotable 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 Appalachian Mountains: up 169% on the route-weighted index since 1968.

Red-eyed Vireo In Appalachian Mountains Population Forecast

If the recent trend holds, Red-eyed Vireo in Appalachian Mountains is projected to rise about 18% by 2030 — from 35 in 2025 to a central estimate of 42 (95% range 36–47). A 5-year backtest shows a typical error of ±10%, with 100% of held-out values landing inside the 95% band.

+18%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 →
42Projected 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 →
36–4795% 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 →
±10%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 Appalachian Mountains is projected to rise about 18% by 2030 — from 35 in 2025 to a central estimate of 42 (95% range 36–47). A 5-year backtest shows a typical error of ±10%, 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 →
2026403446
2027413546
2028413547
2029413647
2030423647

Routes In Appalachian Mountains

Routes recording Red-eyed Vireo in Appalachian Mountains.
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 →
Tar HollowOHIO1452024
FinzelMARYLAND1382025
JenningsMARYLAND1312025
Tussey Mtn.PENNSYLVANIA1182025
EllentonPENNSYLVANIA1052025
Mill RunPENNSYLVANIA1022025
OdinPENNSYLVANIA982025
Mawr GlenPENNSYLVANIA952025
MunsonPENNSYLVANIA942025
Piney GroveMARYLAND932025
CanadensisPENNSYLVANIA922025
OldtownMARYLAND912025
Marsh HillPENNSYLVANIA912025
Wild CreekPENNSYLVANIA852025
GreentownPENNSYLVANIA832024
SigelPENNSYLVANIA812025
StaffordsvilKENTUCKY781997
DuboistownPENNSYLVANIA782024
S Berne 2NEW-YORK762025
StoneybreakPENNSYLVANIA752025
DownsvilleNEW-YORK742019
DresdenOHIO742025
Mohican S.F.OHIO742025
Beattyville 2KENTUCKY722024
Cumberlnd GpKENTUCKY712018

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