California Threatened and Endangered Species http://ecos.fws.gov/
CDFG: Life History Accounts and Range Maps http://www.dfg.ca.gov/biogeodata/cwhr/cawildlife.aspx
San Joaquin Valley Animals http://esrp.csustan.edu/speciesprofiles/
Animal Diversity Web http://animaldiversity.ummz.umich.edu
California Department of Fish and Game -- Classification Search http://www.dfg.ca.gov/hcpb/species/t_e_spp/tespp.shtml
California Endangered Insects -- UC Berkeley http://essig.berkeley.edu/endins/listed.htm
Animal Information Index http://www.animalinfo.org/spec_ind.htm
Library Catalog at California State University, Fullerton http://guides.library.fullerton.edu/endangered/california.htm
Defenders of Wildlife http://www.defenders.org/california/species.html
Center for Biological Diversity: Species List http://www.biologicaldiversity.org/species/index.html
Endangered Species of Santa Cruz County http://www.santacruzpl.org/ref/endang/endang.shtml
U.S. Fish and Wildlife: 2009 Endangered Animal Species List http://ecos.fws.gov/tess_public/StateListingAndOccurrence.do?state=CA
Sacramento Fish and Wildlife Office: Kids Info http://www.fws.gov/sacramento/es/kids_species_info.htm
Smithsonian Institution: North American Mammals http://www.mnh.si.edu/mna/main.cfm