Yosemite National Park's approximately 90 mammal species, and their behaviors, are truly fascinating for park visitors to observe safely and responsibly. Seventeen mammals have a special status by either the federal or California state governments due to declining population numbers or to a lack of information about their numbers and distribution. Ongoing research has put a magnifying lens on several mammal species within the park and continues to build on work in the 1920s by famous mammal researcher Joseph Grinnell. ![]() Black bears
American black bears found in Yosemite have long been of intense interest to park visitors and managers. ![]() Sierra Nevada bighorn sheep
Sierra Nevada bighorn sheep are once again at home in Yosemite's supremely beautiful Cathedral Range after an absence of over 100 years. ![]() Sierra Nevada Red Fox
A photo of a red fox padding atop a crest of snow in the far northern wilderness of Yosemite was proof that this creature is still alive. ![]() Pacific Fisher
Yosemite's wildlife staff have deployed motion-activated cameras in targeted locations to learn more about fishers and help them survive. ![]() Mountain Lions
Mountain lions—also called cougars, pumas or panthers—roam Yosemite’s mountains and valleys and are a natural part of the landscape. ![]() Bats
Yosemite is home to 17 species of bats, the only mammals capable of flight. ![]() Deer
![]() Rodents
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Last updated: February 13, 2017