Name and Description  
Coyote  (Family Canidae)
Canis latrans
Grey fox  (Family Canidae)
Urocyon cinereoargenteus
Red fox  (Family Canidae)
Vulpes vulpes
Black-tailed deer  (Family Cervidae)
Odocoileus hemionus
Common muskrat  (Family Cricetidae)
Ondatra zibethicus
California vole  (Family Cricetidae)
Microtus californicus

This 4-6" creature is a creator of various survival techniques.  By cutting down some of the taller grasses they create a walkway to safety when a predator comes around.  They live in a burrow that they create and feed on plant material. 

Western harvest mouse  (Family Cricetidae)
Reithrodontomys megalotis
Dusky-footed woodrat  (Family Cricetidae)
Neotoma fuscipes
Salt water harvest mouse (Family Cricetidae)
Reithrodontomys raviventris 

Long tailed, reddish-brown, 2-3 inches long with large ears is an endangered species in the San Francisco Bay area.  It lives only in the salt marshes, especially the pickleweed.  It can drink saltwater unlike most mammals.  It eats seeds and insects.  They are eaten by hawks, and other large predator birds.  

Pinon mouse  (Family Cricetidae)
Peromyscus truei
Deer mouse  (Family Cricetidae)
Peromyscus maniculatus
California mouse  (Family Cricetidae)
Peromyscus californicus
Virginia Opossum  (Family Didelphidae)
Didelphis virginiana
California Bobcat  (Family Felidae)
Lynx rufus

They are about 15-30 pounds and ~ 20" at the shoulder.  They appear to be like a domestic cat but they are more the size of a medium dog.  Feeding on a variety of animals including rodents, birds and some bats.     

Botta's pocket gopher  (Family Geomyidae)
Thomomys bottae
Hermann's kangaroo rat  (Family Heteromyidae)
Dipodomys heermannii
California Pocket mouse  (Family Heteromyidae)
Chaetodipus californicus
Audubon's Cottontail  (Family Leporidae)
Sylvilagus audubonii
Brush Rabbit  (Family Leporidae)
Sylvilagus bachmani
Black-tailed Jackrabbit  (Family Leporidae)
Lepus californicus
Western spotted skunk  (Family  Mephitidae)
Spilogale gracilis
Striped skunk  (Family Mephitidae)
Mephitis mephitis

A shiny black coat with two distinct white stripes identifies this nocturnal mammal.  They feed on insects, berries, plant bulbs, bird eggs and mice.  Their tracks are identified by the inward pointing toes.  When startled they can spray a fetid, oily musk up to 15". 

Brazilian free-tailed Bat  (Family Molossidae)
Tadarida brasilersis
Norway rat  (Family Muridae)
Rattus norvegicus
Black Rat  (Family Muridae)
Rattus rattus
Long-tailed Weasel  (Family Mustelidae)
Mustela frenata
Raccoon  (Family Procyonidae)
Procyon lotor
Ringtail  (Family Procyonidae)
Bassariscus astutris
Western Grey Squirrel  (Family Scuridae)
Sciurus griseu
California Ground Squirrel  (Family Scuridae)
Spermophilus beecheyi
Ornate Shrew  (Family Scuridae)
Sorex ornatus
Vagrant Shrew  (Family Scuridae)
Sorex vagrans
Broad-footed Mole  (Family Talpidae)
Scapanus latimanus
Fringed Myotis  (Family Vespertilionidae)
Myotis thysanodes
Hoary Bat  (Family Vespertilionidae)
Lasiurus cinereus
Yuma Bat  (Family Vespertilionidae)
Myotis yumanensis
Pallid bat  (Family Vespertilionidae)
Antrozous pallidus
California Myotis  (Family Vespertilionidae)
Myotis californicus 
Long-eared Myotis  (Family Vespertilionidae)
Myotis evotis
Townsend's big-eared bat  (Family Vespertilionidae)
Pelcotus townsendii