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

Worm-eating Warbler In Piedmont

All regionsPiedmontForest birds

Worm-eating Warbler in Piedmont has surged: up 111% on the route-weighted index since 1969.

+111%Since 1969
65Routes In Region
52Years

Notable Signals

long arc increasecomputed index

Worm-eating Warbler has surged in Piedmont: up 111% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Worm-eating Warbler in Piedmont is projected to stay roughly flat through 2029, near 0.19 (95% range 0.10–0.29). A 5-year backtest shows a typical error of ±19.4%, with 100% of held-out values landing inside the 95% band.

+3%Change by 2029
0.19Projected 2029 index
0.10–0.2995% range
±19.4%Backtest error
19672029
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
20250.180.090.28
20260.190.090.29
20270.190.090.29
20280.190.090.29
20290.190.100.29

Routes In Piedmont

Routes recording Worm-eating Warbler in Piedmont.
NixburgALABAMA41999
EkloMARYLAND42017
OwingsSOUTH-CAROLINA42000
EarltonMARYLAND32024
ShipmanVIRGINIA32024
Carters Brdg 2VIRGINIA32023
Piedmont NwrGEORGIA21995
Van BibberMARYLAND22013
MadonnaMARYLAND22017
EdenNORTH-CAROLINA22018
SchwenksvillPENNSYLVANIA22002
ConcordVIRGINIA22024
MannboroVIRGINIA22019
HallVIRGINIA22023
Lake AnnaVIRGINIA22024
MillervilleALABAMA12012
Liberty City 2ALABAMA12022
Nixburg 2ALABAMA12013
WedoweeALABAMA12023
BaldwinGEORGIA12022
BowdonGEORGIA12008
HiramGEORGIA11987
WashingtonGEORGIA11989
WhitesburgGEORGIA12001
SharonGEORGIA12018

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