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

Swainson's Warbler In Piedmont

All regionsPiedmontForest birds

Swainson's Warbler in Piedmont has surged: up 483% on the route-weighted index since 1981.

+483%Since 1981
31Routes In Region
29Years

Notable Signals

long arc increasecomputed index

Swainson's Warbler has surged in Piedmont: up 483% on the route-weighted index since 1981.

Forecast

If the recent trend holds, Swainson's Warbler in Piedmont is projected to fall about 13% by 2029 — from 0.10 in 2024 to a central estimate of 0.09 (95% range 0.03–0.15). A 5-year backtest shows a typical error of ±64.6%, with 0% of held-out values landing inside the 95% band.

-13%Change by 2029
0.09Projected 2029 index
0.03–0.1595% range
±64.6%Backtest error
19792029
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
20250.080.020.14
20260.080.020.14
20270.080.020.14
20280.090.020.15
20290.090.030.15

Routes In Piedmont

Routes recording Swainson's Warbler in Piedmont.
Liberty City 2ALABAMA32024
MillervilleALABAMA22024
Yates CrossroadsGEORGIA22023
Plum BranchSOUTH-CAROLINA21988
LanettALABAMA12024
Liberty CityALABAMA12005
Nixburg 2ALABAMA12021
WedoweeALABAMA12023
ForsythGEORGIA12024
BaldwinGEORGIA11981
GrovetownGEORGIA12019
BowdonGEORGIA12007
StockbridgeGEORGIA11985
RutledgeGEORGIA12024
JulietteGEORGIA12023
WhitesburgGEORGIA12015
Lincolnton 2GEORGIA12022
SharonGEORGIA12018
Sunny SideGEORGIA12019
Rock BranchGEORGIA12022
Stoney Point 2GEORGIA12022
Piedmont NwrGEORGIA11991
JordanNORTH-CAROLINA11979
OakboroNORTH-CAROLINA12024
ArcolaNORTH-CAROLINA12000

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