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

Savannah Sparrow In Piedmont

All regionsPiedmontGrassland birds

Savannah Sparrow in Piedmont has increased: up 42% on the route-weighted index since 1968.

+42%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
25Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
53YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Savannah Sparrow in Piedmont. See the full index history below.

Savannah Sparrow In Piedmont Population Forecast

If the recent trend holds, Savannah Sparrow in Piedmont is projected to stay roughly flat through 2029, near 0.12 (95% range 0.01–0.22). A 5-year backtest shows a typical error of ±21.5%, with 100% of held-out values landing inside the 95% band.

-5%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.12Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.01–0.2295% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±21.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Savannah Sparrow in Piedmont is projected to stay roughly flat through 2029, near 0.12 (95% range 0.01–0.22). A 5-year backtest shows a typical error of ±21.5%, with 100% of held-out values landing inside the 95% band.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 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.110.000.22
20260.110.010.22
20270.110.010.22
20280.110.010.22
20290.120.010.22

Routes In Piedmont

Routes recording Savannah Sparrow in Piedmont.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
TaylorstownVIRGINIA71985
EmmitsburgMARYLAND62024
TheodoreMARYLAND51968
LeolaPENNSYLVANIA52024
FowblesburgMARYLAND31977
AkronPENNSYLVANIA31997
OlneyMARYLAND21988
LabottPENNSYLVANIA21983
Doe RunPENNSYLVANIA21979
West GrovePENNSYLVANIA21986
Mount JoyPENNSYLVANIA22002
BendersvillePENNSYLVANIA22016
WarfieldsbrgMARYLAND12018
Pleasant ValMARYLAND11968
EkloMARYLAND11983
RandallstownMARYLAND11966
MadonnaMARYLAND12019
CrotonNEW-JERSEY12007
PottersvilleNEW-JERSEY12022
Croton 2NEW-JERSEY12018
SheffieldNORTH-CAROLINA12011
CollegevillePENNSYLVANIA11972
Mt Gretna 2PENNSYLVANIA12019
ShrewsburyPENNSYLVANIA12007
Carters BrdgVIRGINIA11973

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