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

Spotted Owl In Sierra Nevada

All regionsSierra NevadaGeneralists

Spotted Owl in Sierra Nevada has collapsed: down 82% on the route-weighted index since 1975.

-82%Since 1975
6Routes In Region
15Years

Notable Signals

long arc declinecomputed index

Spotted Owl has collapsed in Sierra Nevada: down 82% on the route-weighted index since 1975.

Routes In Sierra Nevada

Routes recording Spotted Owl in Sierra Nevada.
Cottage SpgsCALIFORNIA21975
LumberyardCALIFORNIA11989
Greenhorn MtCALIFORNIA11997
Silver CityCALIFORNIA12009
DownievilleCALIFORNIA11987
Pollock PinesCALIFORNIA11999

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