San Diego Natural History Museum--Your Nature ConnectionSDNHM Biodiversity Research Center of the Californias

Checklist of Mammal Species
Recorded in Imperial County

Birds & Mammals | BRCC | Field Guide

Classification at the species level follows "Mammal Species of The World," 2nd ed., 1993, by D. E. Wilson and D. M. Reeder; that at the subspecies level "The Mammals of North America," 2nd ed., 1981, by E. R. Hall. English names refer to the species as a whole, not individual component subspecies. If a species has a restricted range or multiple subspecies occur in Imperial County, this range is indicated briefly.

** Double asterisks specify that the mammal's occurrence in Imperial County is supported by specimens in the San Diego Natural History Museum.
* Single asterisks specify that specimens in other museums have been reported in the literature.

Opossums: Family Didelphidae
Opossum Didelphis virginiana virginiana (introduced)

Shrews: Family Soricidae
Desert or Desert Gray Shrew Notiosorex crawfordi crawfordi**

Leaf-nosed Bats: Family Phyllostomatidae
California Leaf-nosed Bat Macrotus californicus**
Plain-nosed Bats: Family Vespertilionidae
Pallid Bat Antrozous pallidus pallidus
Big Brown Bat Eptesicus fuscus pallidus**
California Myotis Myotis californicus stephensi**
Little Brown Myotis Myotis lucifugus occultus**
Cave Myotis Myotis velifer brevis
Yuma Myotis Myotis yumanensis yumanensis**
Western Pipistrelle Pipistrellus hesperus hesperus**
Townsend's Big-eared Bat Plecotus townsendii pallescens**
Free-tailed Bats: Family Molossidae
Western Mastiff Bat Eumops perotis californicus
Pocketed Free-tailed Bat Nyctinomops femorosaccus
Mexican Free-tailed Bat Tadarida brasiliensis mexicana**

Dogs: Family Canidae
Coyote Canis latrans mearnsi**
Gray Fox Urocyon cinereoargenteus scottii**
Kit Fox Vulpes velox arsipus**
Cats: Family Felidae
Bobcat Lynx rufus baileyi**
Mountain Lion Puma concolor browni
Jaguar Panthera onca arizonensis (extirpated)
Weasels and Relatives: Family Mustelidae
River Otter Lontra canadensis sonora
Striped Skunk Mephitis mephitis estor**
Spotted Skunk Spilogale putorius phenax*
Badger Taxidea taxus berlandieri**
Raccoons and Relatives: Family Procyonidae
Raccoon Procyon lotor pallidus**
Ringtail Bassariscus astutus yumanensis*

Deer and Relatives: Family Cervidae
Mule Deer Odocoileus hemionus eremicus
Pronghorn: Family Antilocapridae
Pronghorn Antilocapra americana americana (extirpated)
Cattle, Sheep, and Relatives: Family Bovidae
Bighorn Sheep Ovis canadensis (threatened)

O. c. cremnobates (SW corner of county)

O. c. nelsoni (Chocolate Mts.)

Squirrels: Family Sciuridae
White-tailed Antelope Squirrel Ammospermophilus leucurus leucurus**
Round-tailed Ground Squirrel Spermophilus tereticaudus tereticaudus**
Baja California Chipmunk Tamias obscurus obscurus* (SW corner of county only)
Beaver: Family Castoridae
Beaver Castor canadensis repentinus**
Pocket Gophers: Family Geomyidae
Valley or Botta's Pocket Gopher Thomomys bottae
  T. b. albatus** (Imperial Valley and eastern Imperial Co.)
  T. b. boregoensis** (western Imperial Co.)
  T. b. crassus* (E side Salton Sea)
  T. b. rupestris* (Chocolate Mts.)
Pocket Mice: Family Heteromyidae
Agile Kangaroo Rat Dipodomys agilis cabezonae (SW corner of county only)
Desert Kangaroo Rat Dipodomys deserti deserti**
Merriam's Kangaroo Rat Dipodomys merriami
  D. m. trinidadensis** (SW corner of county)
  D. m. arenivagus** (Imperial Valley and west)
  D. m. merriami** (east of Salton Sea and Imperial Valley)
Bailey's Pocket Mouse Chaetodipus baileyi hueyi*
San Diego Pocket Mouse Chaetodipus fallax pallidus** (SW corner of county only)
Long-tailed Pocket Mouse Chaetodipus formosus mesembrinus**
Desert Pocket Mouse Chaetodipus penicillatus angustirostris**
Spiny Pocket Mouse Chaetodipus spinatus
  C. s. spinatus**
  C. s. rufescens* (SW corner of county only)
Little Pocket Mouse Perognathus longimembris**
  P. l. internationalis** (SW corner of county)
  P. l. bombycinus** (near Colorado River)
Rats and Mice: Family Muridae
California Vole Microtus californicus sanctidiegi (SW corner of county only)
Muskrat Ondatra zibethicus bernardi**
House Mouse Mus musculus** (introduced)
Norway Rat Rattus norvegicus (introduced)
Roof Rat or Black Rat Rattus rattus (introduced)
White-throated Woodrat Neotoma albigula venusta**
Desert Woodrat Neotoma lepida
  N. l. gilva** (SW corner of county)
  N. l. lepida** (central and western Imperial Co.)
  N. l. grinnelli** (eastern Imperial Co.)
Southern Grasshopper Mouse Onychomys torridus pulcher**
Brush Mouse Peromyscus boylii rowleyi* (SW corner of county only)
California Mouse Peromyscus californicus insignis* (SW corner of county only)
Canyon Mouse Peromyscus crinitus stephensi**
Cactus Mouse Peromyscus eremicus eremicus**
Deer Mouse Peromyscus maniculatus sonoriensis**
Piñon Mouse Peromyscus truei martirensis* (SW corner of county only)
Western Harvest Mouse Reithrodontomys megalotis megalotis**
Hispid Cotton Rat Sigmodon hispidus eremicus**

Rabbits and Hares: Family Leporidae
Black-tailed Jackrabbit Lepus californicus deserticola*
Desert Cottontail Sylvilagus audubonii arizonae**