BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Spotted Sandpiper In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieShorebirds

Spotted Sandpiper in Eastern Tallgrass Prairie has edged down: down 19% on the route-weighted index since 1968.

-19%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 →
101Routes 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 →
58YearsYears 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 →

No notable trend signals for Spotted Sandpiper in Eastern Tallgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Spotted Sandpiper in Eastern Tallgrass Prairie is projected to fall about 28% by 2029 — from 0.09 in 2024 to a central estimate of 0.06 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±36.3%, with 100% of held-out values landing inside the 95% band.

-28%Change 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 →
0.06Projected 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 →
0.00–0.1495% 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 →
±36.3%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 Eastern Tallgrass Prairie is projected to fall about 28% by 2029 — from 0.09 in 2024 to a central estimate of 0.06 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±36.3%, 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 →
20250.060.000.14
20260.060.000.14
20270.060.000.14
20280.060.000.14
20290.060.000.14

Routes In Eastern Tallgrass Prairie

Routes recording Spotted Sandpiper in Eastern Tallgrass Prairie.
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 →
MonticelloILLINOIS32009
UnionILLINOIS32017
HebronINDIANA32021
CubaINDIANA32019
Ash CreekMINNESOTA32022
RaymondWISCONSIN32024
BarringtonILLINOIS21999
GreenviewILLINOIS22023
Kankakee SandsINDIANA22008
MelroseIOWA22012
BryantIOWA22022
DinsdaleIOWA21983
Sioux CityIOWA22024
FilleyMISSOURI22012
IrvingtonNEBRASKA21974
RichlandNEBRASKA22024
AshleyOHIO22009
HolcombILLINOIS12008
ItascaILLINOIS11998
AtkinsonILLINOIS12011
GeneseoILLINOIS11997
SheffieldILLINOIS12016
BudaILLINOIS12023
ComptonILLINOIS12018
StreatorILLINOIS11986

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