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

Black-throated Green Warbler In Piedmont

All regionsPiedmontForest birds

Black-throated Green Warbler in Piedmont has declined: down 49% on the route-weighted index since 1986.

-49%Since 1986
9Routes In Region
19Years

Notable Signals

No notable trend signals for Black-throated Green Warbler in Piedmont. See the full index history below.

Forecast

If the recent trend holds, Black-throated Green Warbler in Piedmont is projected to stay roughly flat through 2021, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±41.8%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2021
0.01Projected 2021 index
0.00–0.0395% range
±41.8%Backtest error
19722021
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20170.010.000.04
20180.010.000.04
20190.010.000.03
20200.010.000.03
20210.010.000.03

Routes In Piedmont

Routes recording Black-throated Green Warbler in Piedmont.
WedoweeALABAMA22007
ElamsvilleVIRGINIA22016
Liberty CityALABAMA11982
Nixburg 2ALABAMA12011
BaldwinGEORGIA11998
Mt Gretna 2PENNSYLVANIA12014
AmherstVIRGINIA12007
ShipmanVIRGINIA11989
Pw Forest PkVIRGINIA12004

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