| Common name | Scientific name | General habitat type |
| Opossums | Didelphis marsupialis | low elevations near Idyllwild |
| Striped Skunk | Mephitus mephitus | low elevations near water |
| Spotted Skunk | Spilogale putorius | rocky areas under conifers |
| Raccoon | Procyon lotor | lower elevations along streams |
| Ringtail | Bassariscus astutus | lower, middle elevations; aboreal; near water |
| Long-tailed weasel | Mustela frenata | all habitats; prefers rocky areas; avoids streamside habitats |
| Pacific Kangaroo Rat | Dipodomys agilis | low elevations; sagebrush, chaparral |
| Dusky-footed Wood rat | Neotoma fuscipes | low elevations; hardwood forests, brushland |
| Parasitic Mouse | Peromyscus californicus | oak woodlands, chaparral |
| Deer Mouse | Peromyscus maniculatus | all habitats |
| Brush Mouse | peromyscus boylei | low elevations; chaparral, manzanita |
| California Meadow Vole | Microtus californicus | lowlands, foothills; usually wet meadows |
| Broad-footed Mole | Scapanus latimanus | floodplains, areas of wet soil |
| Ornate Shrew | Sorex ornatus | open areas of lower elevations |
| California Ground Squirrel | Spermophilus beecheyi | all habitats below 10,000 ft |
| Golden-mantled Ground Squirrel | Spermophilus lateralis | coniferous forests |
| Northern Flying Squirrel | Glaucomys sabrinus | coniferous forests, esp. with white fir |
| Western Gray Squirrel | Sciurus griseus | woodland tree squirrel |
| Merriam’s Chipmunk | Tamias merriami | lower woods slopes |
| Lodgepole Chipmunk | Tamias speciosus | higher elevations; Jeffrey/Lodgepole pine forests |
| Botta’s Pocket Gopher | Thomomys bottae | all habitats; absent from high mountain elevations in Sierra Nevada |
| Mule Deer | Odocoileus hemionus | forests, meadows |
| Coyote | Canis latrans | all habitats; open country |
| Gray Fox | Urocyon cinereoargenteus | all habitats |
| Cougar (mountain lion) | Felis concolor | all habitats; forested and brushy areas; avoids open area |
| Bobcat | Lynx rufus | all habitats |
| Hoary Bat | Lasiurus cinereus | wooded areas of CA |
| California Bat | Myotis californicus | lowlands; Oak woodlands, juniper-pinyon areas; not usually in mountains |
| Little Brown Bat | Myotis lucifugus | all habitats except southwestern CA |
| Western Pipistrelle | Pipistrellus Hesperus | commonly in dryer, lower elevation regions |
| Black Bear | Ursus americanus | not indigenous; occasional migrant |
| Bighorn Sheep | Ovis Canadensis | mid- to low elevations of eastern slopes |