BirdAnalyst
Species · Washington · BBS 2025 Release · 1966–2024

Spotted Sandpiper Population Trend in Washington

All statesShorebirds

Spotted Sandpiper in Washington has edged down: down 22% on the route-weighted index since 1970.

-22%Since 1970TrendPercent 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 →
85Routes 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 →
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 Spotted Sandpiper Trends in WashingtonNotable 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 Washington. See the full index history below.

Spotted Sandpiper Population Forecast in Washington

If the recent trend holds, Spotted Sandpiper in Washington is projected to stay roughly flat through 2029, near 0.77 (95% range 0.25–1.3). A 5-year backtest shows a typical error of ±21.5%, with 100% of held-out values landing inside the 95% band.

+2%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 →
0.77Projected 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 →
0.25–1.395% 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 →
±21.5%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 Washington is projected to stay roughly flat through 2029, near 0.77 (95% range 0.25–1.3). A 5-year backtest shows a typical error of ±21.5%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.760.241.3
20260.760.241.3
20270.760.251.3
20280.770.251.3
20290.770.251.3

Spotted Sandpiper Survey Routes in Washington

Routes recording Spotted Sandpiper in Washington.
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 →
Nighthawk820241993
Wapato720221985
Kendall720241987
Cougar620231969
Twisp420241969
Rimrock320241968
Raymond320132004
Concrete320242013
Carnation320171988
Scootney Reservoir320242009
Newhalem220241968
Brewster219991980
Index219681968
Connell220062006
Tonasket220141984
Ronald220241975
Quincy220051984
Wilbur220152015
Othello219871987
Curlew220181992
Mt Rainier220211992
Potholes220231997
Laurier220221998
Mukilteo220241993
Yakima220241995

Spotted Sandpiper Population Trend in Other States

alabamaalaskaarizonacaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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