BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

Bendire's Thrasher In Great Basin

All regionsGreat BasinArid-land birds

Bendire's Thrasher in Great Basin has collapsed: down 88% on the route-weighted index since 1981.

-88%Since 1981TrendPercent 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 →
14YearsYears 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 →

Bendire's Thrasher has collapsed in Great Basin: down 87% on the route-weighted index since 1981.

Routes In Great Basin

Routes recording Bendire's Thrasher 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 →
LeamingtonUTAH21994
HikoNEVADA11972
CalienteNEVADA12025
Desert NwrNEVADA12019
Iron SpringsUTAH12012

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.