BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Spotted Sandpiper In Badlands and Prairies

All regionsBadlands and PrairiesShorebirds

Spotted Sandpiper in Badlands and Prairies has collapsed: down 79% on the route-weighted index since 1969.

-79%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 →
64Routes 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 →
56YearsYears 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 →

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 Badlands and Prairies: down 79% on the route-weighted index since 1969.

Spotted Sandpiper In Badlands and Prairies Population Forecast

If the recent trend holds, Spotted Sandpiper in Badlands and Prairies is projected to stay roughly flat through 2029, near 0.09 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±226.9%, 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 →
0.09Projected 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 →
0.00–0.2395% 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 →
±226.9%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 Badlands and Prairies is projected to stay roughly flat through 2029, near 0.09 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±226.9%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.090.000.24
20260.090.000.24
20270.090.000.24
20280.090.000.23
20290.090.000.23

Routes In Badlands and Prairies

Routes recording Spotted Sandpiper in Badlands and Prairies.
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 →
MaurineSOUTH-DAKOTA152003
BentleyNORTH-DAKOTA62016
RoyMONTANA41999
AlbionMONTANA41986
MayoworthWYOMING42002
FlatwillowMONTANA31991
RecluseWYOMING31981
Teapot DomeWYOMING31983
Seely 2WYOMING32011
BucknumWYOMING32001
LocateMONTANA21986
St XavierMONTANA22010
BrandenbergMONTANA21970
Cedar PassSOUTH-DAKOTA21977
Hill CitySOUTH-DAKOTA22011
EnglewoodSOUTH-DAKOTA22021
Silver CitySOUTH-DAKOTA22012
ClarkelenWYOMING21975
SeelyWYOMING21999
UptonWYOMING22024
SussexWYOMING22005
Caballa CrkWYOMING22005
HighwoodMONTANA12017
LeroyMONTANA12017
BrusettMONTANA11983

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