BirdAnalyst
Species · BCR 29 · BBS 2025 Release · 1966–2024

Yellow-throated Vireo In Piedmont

All regionsPiedmontForest birds

Yellow-throated Vireo in Piedmont has surged: up 163% on the route-weighted index since 1968.

+163%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 →
155Routes 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 →
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 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 →

Yellow-throated Vireo has surged in Piedmont: up 163% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Yellow-throated Vireo in Piedmont is projected to stay roughly flat through 2029, near 2.3 (95% range 1.8–2.8). A 5-year backtest shows a typical error of ±9.2%, with 80% of held-out values landing inside the 95% band.

-0%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 →
2.3Projected 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 →
1.8–2.895% 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 →
±9.2%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, Yellow-throated Vireo in Piedmont is projected to stay roughly flat through 2029, near 2.3 (95% range 1.8–2.8). A 5-year backtest shows a typical error of ±9.2%, with 80% 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 →
20252.21.72.7
20262.21.72.7
20272.21.72.7
20282.21.72.7
20292.31.82.8

Routes In Piedmont

Routes recording Yellow-throated 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 →
MadonnaMARYLAND102022
Liberty City 2ALABAMA92024
BrodnaxVIRGINIA92024
ArcolaNORTH-CAROLINA82024
AppomattoxVIRGINIA82024
WhitesburgGEORGIA72024
Church RoadVIRGINIA72024
WylliesburgVIRGINIA72019
FinchleyVIRGINIA72021
LanettALABAMA62024
RutledgeGEORGIA62024
Yates CrossroadsGEORGIA62024
BullockNORTH-CAROLINA62024
GuptonNORTH-CAROLINA62024
AmherstVIRGINIA62024
Big IslandVIRGINIA62024
IrisburgVIRGINIA62024
Carters Brdg 2VIRGINIA62024
Salem XrdSOUTH-CAROLINA52019
ConcordVIRGINIA52024
MannboroVIRGINIA52024
Pw Forest PkVIRGINIA52009
HollonvilleGEORGIA42003
JulietteGEORGIA42024
SharonGEORGIA42022

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.