California Department of Fish and Wildlife

Established species of non-native mammals in California

Introduction Table of Content Ferret Bibliography Population Estimates
Ferret Survey Biology and Uses Ferret in the Wild World Distribution
California's Concerns Native Carnivores Other Mustelidae Tables

Table 2

Established Species of Non-native Mammals in California.

Virginia opossum Didelphis virginiana e , r nongame, not protected
European rabbit Oryctolagus cuniculus F not regulated
(Eastern) Gray squirrel Sciurus carolinensis r resident small game
Fox squirrel Sciurus niger r resident small game
Black rat Rattus rattus c not regulated
Norway rat Rattus norvegicus c not regulated
House mouse Mus musculus c not regulated
House cat Felis catus F not regulated, except as
nongame on State F&G refuges
Domestic horse Equus caballus F protected
Domestic burro Equus asinus F protected
Burchell's zebra Equus burchelli e not regulated
Wild pig Sus scrofa F, r big game
Fallow deer Cervus dama f nongame, restricted hunting
Sambar Cervus unicolor e nongame, restricted hunting
Axis deer Cervus axis e , r nongame, restricted hunting
Domestic cattle Bos taurus F not regulated
Bison Bison bison r not regulated
Blackbuck Antilope cervicapra r not regulated (not sport hunted)
Barbary sheep Ammotragus lervia e nongame, restricted hunting
Domestic sheep Ovis aries F not regulated
Himalayan tahr Hemitragus jemlahicus e nongame, restricted hunting
Domestic goat Capra hircus F nongame, restricted hunting
Formerly established:      
Nutria (eradicated) Myocastor coypus e , r  

SOURCE:  c- commensal rodent, e - escaped from captivity; F- feral domestic; r - released from captivity or imported and released

Table 1. Relative sizes of carnivores.
Table 2. Established species of non-native mammals in California.
Table 3. Established populations of escaped pets/ornamental animals.
Table 4. Restricted domestic animals.
Table 5. Restricted and exempted domestic animals.
Table 6. Illegal pets in California.