BirdAnalyst
Species · Washington · BBS 2026 Release · 1966–2025

Spotted Sandpiper Population Trend in Washington

All statesShorebirds

Spotted Sandpiper in Washington has edged down: down 25% on the route-weighted index since 1970.

-25%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 →
57YearsYears 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 fall about 18% by 2030 — from 0.96 in 2025 to a central estimate of 0.79 (95% range 0.27–1.3). A 5-year backtest shows a typical error of ±16.1%, with 100% of held-out values landing inside the 95% band.

-18%Change by 2030TrendPercent 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 →
0.79Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.27–1.395% 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 →
±16.1%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 fall about 18% by 2030 — from 0.96 in 2025 to a central estimate of 0.79 (95% range 0.27–1.3). A 5-year backtest shows a typical error of ±16.1%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20260.780.261.3
20270.780.261.3
20280.780.271.3
20290.780.271.3
20300.790.271.3

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 →
Nighthawk1120251993
Wapato720221985
Cougar620231969
Concrete620252013
Ronald520251975
Greenwater520252017
Newhalem420251968
Twisp420241969
Raymond320132004
Yakima320251995
Scootney Reservoir320242009
Brewster219991980
Index219681968
Connell220062006
Kendall220251987
Tonasket220141984
Quincy220051984
Wilbur220152015
Othello219871987
White Chuck220251992
Curlew220181992
Mt Rainier220211992
Potholes220231997
Laurier220221998
Mukilteo220251993

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 2026-08-14.