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Species · BCR 12 · BBS 2025 Release · 1966–2024

Spotted Sandpiper In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionShorebirds

Spotted Sandpiper in Boreal Hardwood Transition has collapsed: down 88% on the route-weighted index since 1968.

-88%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 →
67Routes 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 →
53YearsYears 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 Boreal Hardwood Transition: down 88% on the route-weighted index since 1968.

Spotted Sandpiper In Boreal Hardwood Transition Population Forecast

If the recent trend holds, Spotted Sandpiper in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±525.5%, 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 →
0.00Projected 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 →
0.00–0.1795% 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 →
±525.5%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 Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±525.5%, 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 →
20250.000.000.17
20260.000.000.17
20270.000.000.17
20280.000.000.17
20290.000.000.17

Routes In Boreal Hardwood Transition

Routes recording Spotted Sandpiper in Boreal Hardwood Transition.
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 →
BayfieldWISCONSIN51987
Mille LacsMINNESOTA31967
WaskishMINNESOTA31981
BootjackMICHIGAN21972
HermanMICHIGAN21997
Crystal FlsMICHIGAN22012
Brocky LakeMICHIGAN22022
ShingletonMICHIGAN21978
CreightonMICHIGAN21988
Lake CityMICHIGAN21971
RacoMICHIGAN21972
RiggsvilleMICHIGAN21968
BackusMINNESOTA21974
FloodwoodMINNESOTA21990
GreenbushMINNESOTA22022
MinongWISCONSIN22011
GilmanWISCONSIN22023
Amnicon FallsWISCONSIN22003
OntonagonMICHIGAN11971
BerglandMICHIGAN11990
Gibbs CityMICHIGAN12004
IshpemingMICHIGAN11990
WilsonMICHIGAN11969
CunardMICHIGAN11990
IsabellaMICHIGAN11987

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