Yosemite National Park is causing the problem. Despite the richness of high-quality habitats in Yosemite, the brown bear, California condor, and least Bell's vireo have become extinct in the park within historical time, and another 37 species currently have special status under either California or federal endangered species legislation. The most serious current threats to Yosemite's wildlife and the ecosystems they occupy include loss of a natural fire regime, exotic species, air pollution, habitat fragmentation, and climate change. On a more local basis, factors such as road kills and the availability of human food have affected some wildlife species. Yosemite National Park has
Little Yosemite Valley their leeward side. Half Dome is a granite dome in Yosemite National Park located at the northwestern end of Little Yosemite Valley at — possibly Yosemite's most familiar rock formation. The granite crest rises more than above the Yosemite Valley floor at Tenaya Canyon and above the floor of Little Yosemite Valley. The trail to Half Dome branches to the north from the main Little Yosemite Valley trail near the ranger station, out houses and campground. Moraine Dome is a granite dome in Yosemite National Park along the northern margin of Little Yosemite Valley at which rises to an elevation