Science Spotlight

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Recent accomplishments of CDFW's scientific community


Wildlife Collars Offer Valuable Conservation Data

deer standing on rocks with trees with a tracking collar
For years, California Department of Fish and Wildlife scientists were trying to locate dens for California’s Sierra Nevada red fox — a rare and threatened species whose population has decreased substantially. Scientists had a general idea that some of the foxes denned at high elevations in the Lassen Peak area, but aside from vague descriptions written in the 1920s, the den locations had never been documented.

Counting Mountain Lions in California’s Back Country

scientist Justin Dellinger driving in mountain lion territory
CDFW wildlife biologist Justin Dellinger has a most unusual job -- since 2015, he’s been capturing and collaring mountain lions in California’s back country. Justin aims to achieve something unique, which is the first-of-its-kind comprehensive population assessment of California’s mountain lions.