BirdAnalyst
Species · Pennsylvania · BBS 2025 Release · 1966–2024

Spotted Sandpiper Population Trend in Pennsylvania

All statesShorebirds

Spotted Sandpiper in Pennsylvania has collapsed: down 93% on the route-weighted index since 1968.

-93%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 →
53Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
49YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

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

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Spotted Sandpiper has collapsed in Pennsylvania: down 93% on the route-weighted index since 1968.

Spotted Sandpiper Population Forecast in Pennsylvania

If the recent trend holds, Spotted Sandpiper in Pennsylvania is projected to stay roughly flat through 2027, near 0.00 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±197.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2027TrendPercent 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 →
0.00Projected 2027 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0995% 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 →
±197.7%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 Pennsylvania is projected to stay roughly flat through 2027, near 0.00 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±197.7%, with 100% of held-out values landing inside the 95% band.19662027
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 →
20230.000.000.09
20240.000.000.09
20250.000.000.09
20260.000.000.09
20270.000.000.09

Spotted Sandpiper Survey Routes in Pennsylvania

Routes recording Spotted Sandpiper in Pennsylvania.
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 →
Peters Mt619931993
Teepleville219671967
Beaver220211994
Pine Gr Mill219671967
Mifflintown219661966
Mt Gretna219671966
Jefferson219881966
Espyville119991973
Harmonsburg120072007
Ferris Crnrs120051967
Wyalusing119891988
Akeley119701970
Berwick120081993
Lynch119991968
N Washington120131970
Russell City120222019
Mars120002000
Eldred119751975
Arnot120032002
Ravensburg119711970
Mawr Glen119931993
Austinville119701967
Rush119981970
Bow Bridge119741969
Waller120001993

Spotted Sandpiper Population Trend in Other States

alabamaalaskaarizonacaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonrhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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