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

Hammond's Flycatcher In Coastal California

All regionsCoastal CaliforniaAerial insectivores

Hammond's Flycatcher in Coastal California has surged: up 102% on the route-weighted index since 1982.

+102%Since 1982TrendPercent 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 →
7Routes 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 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 →

Hammond's Flycatcher has surged in Coastal California: up 102% on the route-weighted index since 1982.

Routes In Coastal California

Routes recording Hammond's Flycatcher 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 →
TomheadCALIFORNIA32010
Lake HemetCALIFORNIA21974
Yolla BollyCALIFORNIA21973
CohassetCALIFORNIA11984
TehamaCALIFORNIA11986
Cal Hot SpgsCALIFORNIA11995
Hough SpringsCALIFORNIA12006

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