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

Spotted Sandpiper In Piedmont

All regionsPiedmontShorebirds

Spotted Sandpiper in Piedmont has fallen sharply: down 66% on the route-weighted index since 1975.

-66%Since 1975TrendPercent 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 →
16Routes 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 →
19YearsYears 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 Spotted Sandpiper in Piedmont. See the full index history below.

Spotted Sandpiper In Piedmont Population Forecast

If the recent trend holds, Spotted Sandpiper in Piedmont is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±39.5%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.01Projected 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 →
0.00–0.0495% 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 →
±39.5%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, Spotted Sandpiper in Piedmont is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±39.5%, 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 →
20250.010.000.05
20260.010.000.05
20270.010.000.04
20280.010.000.04
20290.010.000.04

Routes In Piedmont

Routes recording Spotted Sandpiper 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 →
ElamsvilleVIRGINIA41986
PottersvilleNEW-JERSEY32005
Mt GretnaPENNSYLVANIA21967
AthensGEORGIA11966
EmmitsburgMARYLAND12024
EkloMARYLAND11977
IjamsvilleMARYLAND12024
SandbrookNEW-JERSEY12001
PottstownPENNSYLVANIA11986
CollegevillePENNSYLVANIA12017
GatchelvillePENNSYLVANIA11986
LabottPENNSYLVANIA11979
Mount JoyPENNSYLVANIA11998
Brick TavernPENNSYLVANIA11994
CovesvilleVIRGINIA11984
Taylorstown 2VIRGINIA12023

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