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Species · California · BBS 2025 Release · 1966–2024

Franklin's Gull Population Trend in California

All statesWetland birds

Franklin's Gull in California has increased: up 45% on the route-weighted index since 1993.

+45%Since 1993TrendPercent 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 →
3Routes 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 →
12YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Franklin's Gull 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 Franklin's Gull in California. See the full index history below.

Franklin's Gull Survey Routes in California

Routes recording Franklin's Gull 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 →
Macdoel119941994
Ravendale119951995
Dorris120191991

Franklin's Gull Population Trend in Other States

idahokansasminnesotamontananebraskanorth-dakotaoregonsouth-dakotautahwyoming

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