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Species · BCR 32 · BBS 2025 Release · 1966–2024

Wilson's Snipe In Coastal California

All regionsCoastal CaliforniaShorebirds

Wilson's Snipe in Coastal California has risen sharply: up 69% on the route-weighted index since 1974.

+69%Since 1974TrendPercent 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 →
9Routes 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 →
18YearsYears 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 Wilson's Snipe in Coastal California. See the full index history below.

Wilson's Snipe In Coastal California Population Forecast

If the recent trend holds, Wilson's Snipe in Coastal California is projected to stay roughly flat through 2020, near 0.03 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±51.4%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2020TrendPercent 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 →
0.03Projected 2020 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0995% 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 →
±51.4%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 Coastal California is projected to stay roughly flat through 2020, near 0.03 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±51.4%, with 80% of held-out values landing inside the 95% band.19722020
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 →
20160.040.000.09
20170.040.000.09
20180.040.000.09
20190.030.000.09
20200.030.000.09

Routes In Coastal California

Routes recording Wilson's Snipe in Coastal 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 →
ShafterCALIFORNIA41986
Red BluffCALIFORNIA12015
RiovistaCALIFORNIA11972
HughsonCALIFORNIA11996
Orange CoveCALIFORNIA12007
OnoCALIFORNIA12009
AdelaidaCALIFORNIA11977
AtwaterCALIFORNIA11986
CordovaCALIFORNIA11977

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