BirdAnalyst
Species · BCR 28 · BBS 2025 Release · 1966–2024

Worm-eating Warbler In Appalachian Mountains

All regionsAppalachian MountainsForest birds

Worm-eating Warbler in Appalachian Mountains has surged: up 213% on the route-weighted index since 1968.

+213%Since 1968
310Routes In Region
58Years

Notable Signals

long arc increasecomputed index

Worm-eating Warbler has surged in Appalachian Mountains: up 213% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Worm-eating Warbler in Appalachian Mountains is projected to rise about 36% by 2029 — from 1.1 in 2024 to a central estimate of 1.6 (95% range 1.1–2.0). A 5-year backtest shows a typical error of ±29.4%, with 100% of held-out values landing inside the 95% band.

+36%Change by 2029
1.6Projected 2029 index
1.1–2.095% range
±29.4%Backtest error
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 index95% low95% high
20251.50.982.0
20261.51.02.0
20271.51.02.0
20281.51.02.0
20291.61.12.0

Routes In Appalachian Mountains

Routes recording Worm-eating Warbler in Appalachian Mountains.
Piney GroveMARYLAND212024
OldtownMARYLAND182024
BattlecreekSOUTH-CAROLINA152014
Cumberlnd GpKENTUCKY132018
FontanaNORTH-CAROLINA132024
Front RoyalVIRGINIA122024
Tar HollowOHIO92024
ShanghaiWEST-VIRGINIA92022
Shawnee S.F. 2OHIO82019
St CollegePENNSYLVANIA82024
McfarlandTENNESSEE81993
MeccaTENNESSEE82023
Gr North MtnVIRGINIA82024
GlenwoodVIRGINIA82023
Shenandoa NpVIRGINIA82022
Beattyville 2KENTUCKY72024
HarbuckTENNESSEE72023
W AugustaVIRGINIA72024
Bald KnobVIRGINIA72024
DouthatVIRGINIA72012
Green RidgeMARYLAND62024
Table RockNORTH-CAROLINA62022
StoneybreakPENNSYLVANIA62024
Tussey Mtn.PENNSYLVANIA62024
MarionVIRGINIA61982

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