BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Cassin's Kingbird In Great Basin

All regionsGreat BasinAerial insectivores

Cassin's Kingbird in Great Basin has edged down: down 21% on the route-weighted index since 1990.

-21%Since 1990TrendPercent 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 →
4Routes 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 →

No notable trend signals for Cassin's Kingbird in Great Basin. See the full index history below.

Routes In Great Basin

Routes recording Cassin's Kingbird in Great Basin.
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 →
Meadow VallyNEVADA21999
BerylUTAH22021
Walker CanNEVADA12009
NewcastleUTAH12010

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