BirdAnalyst
Species · BCR 33 · BBS 2025 Release · 1966–2024

Savannah Sparrow In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsGrassland birds

Savannah Sparrow in Sonoran and Mojave Deserts has declined: down 48% on the route-weighted index since 1990.

-48%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 →
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 →

No notable trend signals for Savannah Sparrow in Sonoran and Mojave Deserts. See the full index history below.

Routes In Sonoran and Mojave Deserts

Routes recording Savannah Sparrow in Sonoran and Mojave Deserts.
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 →
OnyxCALIFORNIA21998
Ash MeadowsNEVADA22002
LagunaARIZONA11968
UbehebeCALIFORNIA11970

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