Animal Diversity Web Database - information on the biology and classification of North American mammals.
California Mammal Tracks - online field guide to the tracks of common California mammal.
Bats of Northern California - information about both common and rare bats of Northern California.
Bats of San Diego County - an overview of natural history information for the 23 species native to San Diego County, plus useful links.
California Department of Fish and Wildlife - information on the biology, habitat, and population of California's black bears.
Animal Diversity Web Database - general information on black bears.
Santa Monica Mountains National Recreation Area - information on the bobcats of the Santa Monica Mountains.
Urban Carnivore - information on bobcat range, habitat, and diet, along with research on bobcats of Southern California.
Monterey Bay Aquarium - guide to marine mammals of California.
California Department of Fish and Wildlife - frequently asked questions about mountain lions in California.
Yosemite National Park - information on mountain lions of Yosemite and the greater Sierra Nevada.