Serious threats to Yosemite's wildlife and the ecosystems they occupy include loss of a natural fire regime, non-native species, air pollution, habitat fragmentation, and climate change. read more
Yosemite National Park supports more than 400 species of vertebrates including fish, amphibians, reptiles, birds, and mammals. The high diversity of species is the result of diverse habitats in Yosemite that are largely intact. read more
Bird Songs of Yosemite National Park. There are 255 species to be found in Yosemite thanks to a wide range of climates and elevations ranging from the Sierra Nevada foothills to alpine highlands. read more
American black bears ( Ursus americanus) are an integral part of the Sierra Nevada ecosystem and are only one of the many animal species protected in Yosemite National Park. Black bears forage on a wide variety of natural foods, including grasses, insects, berries, and acorns. read more