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

Wilson's Snipe Population Trend in California

All statesShorebirds

Wilson's Snipe in California has edged up: up 11% on the route-weighted index since 1972.

+11%Since 1972TrendPercent 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 →
49Routes 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 →
54YearsYears 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 CaliforniaNotable 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 Wilson's Snipe in California. See the full index history below.

Wilson's Snipe Population Forecast in California

If the recent trend holds, Wilson's Snipe in California is projected to rise about 41% by 2029 — from 0.51 in 2024 to a central estimate of 0.71 (95% range 0.13–1.3). A 5-year backtest shows a typical error of ±126.1%, with 80% of held-out values landing inside the 95% band.

+41%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 →
0.71Projected 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 →
0.13–1.395% 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 →
±126.1%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, Wilson's Snipe in California is projected to rise about 41% by 2029 — from 0.51 in 2024 to a central estimate of 0.71 (95% range 0.13–1.3). A 5-year backtest shows a typical error of ±126.1%, with 80% of held-out values landing inside the 95% band.19702029
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 →
20250.730.141.3
20260.720.141.3
20270.720.131.3
20280.720.131.3
20290.710.131.3

Wilson's Snipe Survey Routes in California

Routes recording Wilson's Snipe in California.
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 →
Likely1220241971
Davis Creek1220241972
Yreka1020191973
Honey Lake920241972
Ravendale920061973
Gazelle620211988
Little Truckee520231997
Shafter419861986
Madeline420241997
Sattley420191972
Goumaz420111998
Paxton320242000
Ingalls320011973
Eagle Lake219741974
Hackamore220102005
Crowley Lake220241972
Chester220121997
Dorris219941975
Meadow Valley220082004
Macdoel220191972
Clear Lk Res220171989
Cedarville220241974
Butte Meadow220001972
Genesee220241972
Johnsville219851977

Wilson's Snipe Population Trend in Other States

alaskaarizonacoloradoidahoillinoisiowamainemassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-dakotaohiooregonpennsylvaniasouth-dakotautahvermontwashingtonwisconsinwyoming

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