Yosemite's approximately 90 mammal species, and their behaviors, are truly fascinating to observe safely and responsibly. Diverse Habitats and a Diversity of Species. 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. The park’s rich habitats range from thick foothill chaparral to conifer forests to expanses of alpine rock. Animals feel at home in each location.