More information about the Pacific fisher:
- The fisher is a member of the weasel family;
- It's a smaller cousin of the wolverine and is also closely related to the American marten;
- Eats anything from small mammals to birds to fruit to fungus;
- One of the few predators to regularly prey on porcupines;
- The fisher requires old growth habitat in mid to lower elevation forests, where it depends upon large branches for resting, a dense canopy for shelter, and cavities in trees for dens;
- Fishers are believed to be either extirpated or at perilously low numbers in the central and northern parts of the Sierra Nevada;
- The fisher is vulnerable to development, catastrophic wildfire, predation, and intensive logging treatments such as clearcuts;,
- The fisher is also highly susceptible to sicknesses carried by household pets, including Canine Distemper Virus (results in mortality 95% of the time), Canine Parvo Virus, and Taxoplasma gondii (So please vaccinate your pets if you are going to bring them into the forest).
- The elusive fisher has been one of CSERC's prime targets over 15 years of photo-detection surveys in the forests of the region.
This newsletter is a quarterly publication of the
Central Sierra Environmental Resource Center
Twain Harte, CA 95383
Phone: (209) 586-7440
Fax: (209) 586-4986
CSERC is a non-profit organization working to protect the water, wildlife, and wild places of the Northern Yosemite region. CSERC relies entirely on donations and grants to do that critical work.
Board of Directors
Dr. Tom Hofstra
John Buckley, executive director
Julia Stephens, website and outreach
Brenda Whited, Biologist, Lindsey Myers, biologist
Rebecca Cremeen, planning specialist
Heather Campbell, website translation