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California Biologists Collar Sierra Nevada Red Fox in Southern Sierra for First Time

The collar will provide movement data to guide recovery of an endangered population estimated at fewer than 50 animals.

Overview

  • CDFW captured, GPS-collared, and released a Sierra Nevada red fox near Mammoth Lakes in January, the department’s first such operation in the Sierra Nevada.
  • The achievement followed 10 years of remote camera and scat surveys and three years of intensive trapping in the southern range, CDFW said.
  • Location data from the collar and biological samples will support research and long-term recovery planning for the elusive high-elevation subspecies.
  • Fewer than 50 foxes are believed to live in the Sierra Nevada, which is why they carry protections under California’s Threatened listing and the federal Endangered Species Act.
  • Earlier GPS work in 2018 in the Lassen Peak region located dens and clarified reproduction and movement, and scientists say current risks include low genetic diversity and climate-driven pressures.