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.

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.