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

Bank Swallow In Piedmont

All regionsPiedmontAerial insectivores

Bank Swallow in Piedmont has collapsed: down 80% on the route-weighted index since 1968.

-80%Since 1968
26Routes In Region
36Years

Notable Signals

long arc declinecomputed index

Bank Swallow has collapsed in Piedmont: down 80% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Bank Swallow in Piedmont is projected to stay roughly flat through 2023, near 0.04 (95% range 0.00–0.43). A 5-year backtest shows a typical error of ±449%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2023
0.04Projected 2023 index
0.00–0.4395% range
±449%Backtest error
19662023
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
20190.050.000.44
20200.050.000.44
20210.050.000.44
20220.050.000.43
20230.040.000.43

Routes In Piedmont

Routes recording Bank Swallow in Piedmont.
MadonnaMARYLAND642010
SandbrookNEW-JERSEY61993
TaylorstownVIRGINIA61985
Upper XrdsMARYLAND41970
TheodoreMARYLAND42013
CallNORTH-CAROLINA32001
Bachman MillMARYLAND21994
Van BibberMARYLAND21966
AspersPENNSYLVANIA21980
TrymeVIRGINIA21979
EmmitsburgMARYLAND12017
OlneyMARYLAND12015
Pleasant ValMARYLAND11994
EkloMARYLAND11979
IjamsvilleMARYLAND12015
PottersvilleNEW-JERSEY11983
ArcolaNORTH-CAROLINA11986
WacoNORTH-CAROLINA12004
Mt GretnaPENNSYLVANIA11970
CollegevillePENNSYLVANIA11984
Doe RunPENNSYLVANIA11992
Mt Gretna 2PENNSYLVANIA12018
JacobusPENNSYLVANIA11992
ShipmanVIRGINIA11979
Church RoadVIRGINIA11997

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