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Species · Washington · BBS 2025 Release · 1966–2024

Wilson's Snipe Population Trend in Washington

All statesShorebirds

Wilson's Snipe in Washington has surged: up 119% on the route-weighted index since 1970.

+119%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 →
60Routes 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 Wilson's Snipe 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 →

long arc increasecomputed 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 →

Wilson's Snipe has surged in Washington: up 119% on the route-weighted index since 1970.

Wilson's Snipe Population Forecast in Washington

If the recent trend holds, Wilson's Snipe in Washington is projected to rise about 129% by 2029 — from 0.49 in 2024 to a central estimate of 1.1 (95% range 0.08–2.2). A 5-year backtest shows a typical error of ±128.8%, with 100% of held-out values landing inside the 95% band.

+129%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 →
1.1Projected 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 →
0.08–2.295% 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 →
±128.8%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, Wilson's Snipe in Washington is projected to rise about 129% by 2029 — from 0.49 in 2024 to a central estimate of 1.1 (95% range 0.08–2.2). A 5-year backtest shows a typical error of ±128.8%, 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 →
20251.10.072.1
20261.10.072.2
20271.10.082.2
20281.10.082.2
20291.10.082.2

Wilson's Snipe Survey Routes in Washington

Routes recording Wilson's Snipe 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 →
Harwood2019971993
Ewan1520191983
Wapato1320221971
Scootney Reservoir720242009
Mendota 2620001990
Mesa620081994
Turnbull Nwr520231993
Othello519911981
Nighthawk520191993
Columbia Nwr420221992
Asotin420241981
Curlew420131992
Malden420121998
Potholes420191997
Twisp319911969
Harrington320051980
Ronald320241973
Laurier320181999
L. Wenatchee320231993
Chewelah220211977
Ewan 2220242023
Camas220001971
Leavenworth219821982
Ellensburg220241981
Hartline220041997

Wilson's Snipe Population Trend in Other States

alaskaarizonacaliforniacoloradoidahoillinoisiowamainemassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-dakotaohiooregonpennsylvaniasouth-dakotautahvermontwisconsinwyoming

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