BirdAnalyst
Species · South Dakota · BBS 2026 Release · 1966–2025

Spotted Sandpiper Population Trend in South Dakota

All statesShorebirds

Spotted Sandpiper in South Dakota has risen sharply: up 52% on the route-weighted index since 1969.

+52%Since 1969TrendPercent 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 →
29Routes 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 →
47YearsYears 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 South DakotaNotable 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 increasecomputed 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 risen sharply in South Dakota: up 52% on the route-weighted index since 1969.

Spotted Sandpiper Population Forecast in South Dakota

If the recent trend holds, Spotted Sandpiper in South Dakota is projected to rise about 36% by 2030 — from 0.11 in 2025 to a central estimate of 0.15 (95% range 0.00–0.31). A 5-year backtest shows a typical error of ±53.9%, with 100% of held-out values landing inside the 95% band.

+36%Change by 2030TrendPercent 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 →
0.15Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.3195% 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 →
±53.9%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 South Dakota is projected to rise about 36% by 2030 — from 0.11 in 2025 to a central estimate of 0.15 (95% range 0.00–0.31). A 5-year backtest shows a typical error of ±53.9%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20260.140.000.31
20270.140.000.31
20280.140.000.31
20290.140.000.31
20300.150.000.31

Spotted Sandpiper Survey Routes in South Dakota

Routes recording Spotted Sandpiper in South Dakota.
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 →
Maurine1520031999
Veblen220111968
Long Lake220171998
Harding220252025
Cedar Pass219771968
Hill City220112001
Englewood220212002
Silver City220121997
Lennox120051975
Tripp120222022
Howard120241993
White Lake119881968
Cottonwood120171995
Rosebud119671967
Volga120231976
Raymond120182012
Roswell120121996
Crow Creek119691969
Wilmot120252011
Forbes120191982
Roubaix Lk119891967
Custer119871987
Gorman120011993
Reva120191993
Eagle Butte120112011

Spotted Sandpiper Population Trend in Other States

alabamaalaskaarizonacaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandtennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.