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

House Sparrow In Piedmont

All regionsPiedmontGeneralists

House Sparrow in Piedmont has collapsed: down 82% on the route-weighted index since 1968.

-82%Since 1968
159Routes In Region
58Years

Notable Signals

long arc declinecomputed index

House Sparrow has collapsed in Piedmont: down 82% on the route-weighted index since 1968.

Forecast

If the recent trend holds, House Sparrow in Piedmont is projected to fall about 100% by 2029 — from 15 in 2024 to a central estimate of 0.00 (95% range 0.00–16). A 5-year backtest shows a typical error of ±131.7%, with 40% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–1695% range
±131.7%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
20250.000.0016
20260.000.0016
20270.000.0016
20280.000.0016
20290.000.0016

Routes In Piedmont

Routes recording House Sparrow in Piedmont.
PassaicNEW-JERSEY2841969
LeolaPENNSYLVANIA2392024
AkronPENNSYLVANIA2051997
Sporting HilPENNSYLVANIA1761977
Mount JoyPENNSYLVANIA1732024
CherryvilleNORTH-CAROLINA1451968
WheatonMARYLAND1342024
EphrataPENNSYLVANIA1281988
MadonnaMARYLAND1252022
Mt GretnaPENNSYLVANIA1232000
LabottPENNSYLVANIA1111983
AspersPENNSYLVANIA981989
Great FallsVIRGINIA841978
EmmitsburgMARYLAND812024
Silver SpgMARYLAND811989
GatchelvillePENNSYLVANIA691990
Upper XrdsMARYLAND602008
CollegevillePENNSYLVANIA592024
EarltonMARYLAND582024
Pleasant ValMARYLAND532024
EkloMARYLAND512018
NorwoodMARYLAND472012
IjamsvilleMARYLAND442024
PendletonSOUTH-CAROLINA431976
MadisonNORTH-CAROLINA381985

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