Please note that while Yosemite remains open during the federal government shutdown, services and facilities are very limited, and certain areas of the park are closed. For more information, please refer to the National Park Service and the Department of the Interior: visit and

As the impact of the government shutdown continues to be felt, Yosemite Conservancy remains committed to supporting Yosemite National Park.

Click here for more information on the availability of Yosemite Conservancy programs and services during the shutdown.

Pacific Fisher Mammal Research - 2011

Pacific Fisher Mammal Research - 2011

Rangers are tracking Pacific fishers, some of Yosemite’s most rare mammals

The Pacific fisher, a relative to the mink and otter, is a medium-sized forest mammal that lives in mature and old growth forests.

It disappeared from more than half its former range in California and is in danger of becoming extinct in the state.

This project, funded by Conservancy donors, collected data necessary to determine the abundance, distribution, and possible population limiting factors that have led to the continuing scarcity of Pacific fishers.

Now that scientists have a better understanding of the causes behind Pacific fisher scarcity in the park, proactive steps are being taken to help restore the animal to the park.

More Wildlife Management Projects

Project Notes

We are pleased to provide funding to Yosemite Conservancy for the Pacific fisher, given the importance of protecting Yosemite’s wild heritage.

Jamie Williams
President, The Wilderness Society
corporate sponsor of Pacific Fisher Mammal Research in Yosemite National Park

Map of Your Impact

From the reintroduction of bighorn sheep to restoration of Yosemite’s legendary trails, your support has made an impact in every corner of the park.