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

Chimney Swift In Appalachian Mountains

All regionsAppalachian MountainsAerial insectivores

Chimney Swift in Appalachian Mountains has fallen sharply: down 54% on the route-weighted index since 1968.

-54%Since 1968
396Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Chimney Swift has fallen sharply in Appalachian Mountains: down 54% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Chimney Swift in Appalachian Mountains is projected to stay roughly flat through 2029, near 4.8 (95% range 2.1–7.5). A 5-year backtest shows a typical error of ±6%, with 100% of held-out values landing inside the 95% band.

-5%Change by 2029
4.8Projected 2029 index
2.1–7.595% range
±6%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
20255.32.68.0
20265.22.57.9
20275.02.37.7
20284.92.27.6
20294.82.17.5

Routes In Appalachian Mountains

Routes recording Chimney Swift in Appalachian Mountains.
BirminghamALABAMA1451995
ClimerTENNESSEE522004
WilliamsportMARYLAND482024
RydePENNSYLVANIA472005
DearmanvilleALABAMA451983
Corryton RdTENNESSEE442019
ParkwoodPENNSYLVANIA422024
McdonaldWEST-VIRGINIA422023
Coal RunOHIO411992
PortersvillePENNSYLVANIA401988
HopeNEW-JERSEY391994
BloomsburyNEW-JERSEY382024
ArleeWEST-VIRGINIA361979
NewcomerstwnOHIO351995
WakenaPENNSYLVANIA322023
PattonPENNSYLVANIA312024
MidvaleNEW-JERSEY292022
StonecreekOHIO282024
KittanningPENNSYLVANIA282024
FayettevilleWEST-VIRGINIA281996
Plesant GrovPENNSYLVANIA272024
StaffordsvilKENTUCKY261997
DoylesburgPENNSYLVANIA252023
MartinsburgPENNSYLVANIA242024
SummittALABAMA231981

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