The Bay checkerspot butterfly, a federally listed threatened species, has habitat in the Range, especially at Mount Diablo. The California tiger salamander (Ambystoma californiense), also a federally threatened species and a vulnerable species of amphibian native to Northern California, lives in ponds in the range. The northern Pacific rattlesnake is thriving, as are many ground squirrels, hares, and various species of native and nonnative rodents.