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

Long-billed Curlew In Coastal California

All regionsCoastal CaliforniaShorebirds

Long-billed Curlew in Coastal California has fallen sharply: down 60% on the route-weighted index since 1972.

-60%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 →
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 →
16YearsYears 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 →

long arc declinecomputed 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 →

Long-billed Curlew has fallen sharply in Coastal California: down 60% on the route-weighted index since 1972.

Routes In Coastal California

Routes recording Long-billed Curlew 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 →
AthloneCALIFORNIA221972
AtwaterCALIFORNIA122007
RiovistaCALIFORNIA51971
Ora LomaCALIFORNIA41976
CaruthersCALIFORNIA21984
GlennCALIFORNIA22005
ParkfieldCALIFORNIA11970
WestleyCALIFORNIA11992
TranquillityCALIFORNIA12000

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