BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Black Swift In Sierra Nevada

All regionsSierra NevadaAerial insectivores

Black Swift in Sierra Nevada has collapsed: down 86% on the route-weighted index since 1977.

-86%Since 1977
7Routes In Region
14Years

Notable Signals

long arc declinecomputed index

Black Swift has collapsed in Sierra Nevada: down 86% on the route-weighted index since 1977.

Routes In Sierra Nevada

Routes recording Black Swift in Sierra Nevada.
Bass LakeCALIFORNIA12008
Silver CityCALIFORNIA11980
Kings CanyonCALIFORNIA12004
Hat CreekCALIFORNIA12004
LakeshoreCALIFORNIA11987
CoultervilleCALIFORNIA11998
KernvilleCALIFORNIA12008

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