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

Eared Grebe In Coastal California

All regionsCoastal CaliforniaWetland birds

Eared Grebe in Coastal California has collapsed: down 92% on the route-weighted index since 1973.

-92%Since 1973TrendPercent 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 →
5Routes 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 →
15YearsYears 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 →

Eared Grebe has collapsed in Coastal California: down 92% on the route-weighted index since 1973.

Routes In Coastal California

Routes recording Eared Grebe 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 →
Big BearCALIFORNIA631986
CopperopolisCALIFORNIA62017
Elizabeth LkCALIFORNIA52016
Orange CoveCALIFORNIA41980
Foster ParkCALIFORNIA11971

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