BirdAnalyst
Species · BCR 29 · BBS 2026 Release · 1966–2025

Red-eyed Vireo In Piedmont

All regionsPiedmontForest birds

Red-eyed Vireo in Piedmont has risen sharply: up 66% on the route-weighted index since 1968.

+66%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 →
169Routes 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 risen sharply in Piedmont: up 66% on the route-weighted index since 1968.

Red-eyed Vireo In Piedmont Population Forecast

If the recent trend holds, Red-eyed Vireo in Piedmont is projected to stay roughly flat through 2030, near 17 (95% range 14–21). A 5-year backtest shows a typical error of ±11.4%, with 100% of held-out values landing inside the 95% band.

+6%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 →
17Projected 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 →
14–2195% 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 →
±11.4%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 Piedmont is projected to stay roughly flat through 2030, near 17 (95% range 14–21). A 5-year backtest shows a typical error of ±11.4%, 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 →
2026171321
2027171321
2028171421
2029171421
2030171421

Routes In Piedmont

Routes recording Red-eyed Vireo in Piedmont.
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 →
HallVIRGINIA652025
Pw Forest PkVIRGINIA642009
BrodnaxVIRGINIA572025
Liberty CityALABAMA562011
ArcolaNORTH-CAROLINA562025
EarltonMARYLAND552024
Liberty City 2ALABAMA502025
BullockNORTH-CAROLINA472025
OlneyMARYLAND452025
MadonnaMARYLAND432022
FinchleyVIRGINIA392021
AppomattoxVIRGINIA382024
Carters Brdg 2VIRGINIA382025
Piedmont NwrGEORGIA372003
YoungsvilleNORTH-CAROLINA352025
TrymeVIRGINIA352025
OsmondNORTH-CAROLINA332025
IrisburgVIRGINIA322025
Uwharrie NfNORTH-CAROLINA312001
Church RoadVIRGINIA312025
ElamsvilleVIRGINIA302016
MoranVIRGINIA302025
Ft Pickett NVIRGINIA301995
IjamsvilleMARYLAND292025
DurhamNORTH-CAROLINA292025

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