BirdAnalyst
Species · BCR 2 · BBS 2025 Release · 1966–2024

Bonaparte's Gull In BCR 2

All regionsBCR 2Wetland birds

Bonaparte's Gull in BCR 2 has increased: up 37% on the route-weighted index since 1996.

+37%Since 1996TrendPercent 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 →
17YearsYears 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 Bonaparte's Gull in BCR 2. See the full index history below.

Routes In BCR 2

Routes recording Bonaparte's Gull in BCR 2.
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 →
ChiniakALASKA22021
Togiak RiverALASKA22003
Katmai N.P.ALASKA12012
DillinghamALASKA12013
King SalmonALASKA12017
Gweek RiverALASKA11994
TupuknukALASKA11995

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