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

Vesper Sparrow In Piedmont

All regionsPiedmontGrassland birds

Vesper Sparrow in Piedmont has collapsed: down 99% on the route-weighted index since 1968.

-99%Since 1968
34Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Vesper Sparrow has collapsed in Piedmont: down 99% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Vesper Sparrow in Piedmont is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.65). A 5-year backtest shows a typical error of ±2896.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.00Projected 2029 index
0.00–0.6595% range
±2896.6%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
20250.000.000.65
20260.000.000.65
20270.000.000.65
20280.000.000.65
20290.000.000.65

Routes In Piedmont

Routes recording Vesper Sparrow in Piedmont.
JacobusPENNSYLVANIA31994
EmmitsburgMARYLAND22024
EkloMARYLAND22001
RandallstownMARYLAND21979
SandbrookNEW-JERSEY21969
AspersPENNSYLVANIA21984
GatchelvillePENNSYLVANIA21990
OlneyMARYLAND12008
WarfieldsbrgMARYLAND12006
Pleasant ValMARYLAND12010
Bachman MillMARYLAND12017
FowblesburgMARYLAND12011
Upper XrdsMARYLAND11992
TheodoreMARYLAND11994
IjamsvilleMARYLAND12015
Bald FriarMARYLAND11996
PottersvilleNEW-JERSEY11980
EphrataPENNSYLVANIA11981
Mt GretnaPENNSYLVANIA11989
PottstownPENNSYLVANIA11966
LabottPENNSYLVANIA11983
West GrovePENNSYLVANIA11967
Mount JoyPENNSYLVANIA12010
Mt Gretna 2PENNSYLVANIA12015
Brick TavernPENNSYLVANIA11996

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