page_title: List of mammals of the United States
section_title: Order: Artiodactyla (even-toed ungulates)
hierarchical_section_title: List of mammals of the United States / Subclass: Theria / Infraclass: Eutheria / Order: Artiodactyla (even-toed ungulates)
caption_attribution_description: Bighorn Sheep in Yellowstone National Park, December 2008
context_page_description: About 490 species of mammals are recorded in the United States. This list is probably incomplete. Unincorporated territories like for example Puerto Rico, Guam or Northern Mariana Islands are not covered. Mammals introduced and extinct in the Holocene except Pleistocene/Holocene boundary are included.
  According to the IUCN Red List 3 of these species are critically endangered, 20 endangered, 15 vulnerable, 20 near threatened and 4 extinct.
  Some species are identified as indicated below:
  - Accidental
  - Extinct
  - Extirpated
  (I) - Introduced
  The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature:
  and the Endangered Species Act:
context_section_description: The even-toed ungulates are ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in perissodactyls. There are about 220 artiodactyl species, including many that are of great economic importance to humans.
  Family: Tayassuidae (peccaries)
  Collared peccary, Tayassu tajacu  LC
  Family: Cervidae (deer)
  Subfamily: Cervinae
  Elk, Cervus canadensis  (sometimes as C. elaphus canadensis; C. elaphus: LC)
  Subfamily: Capreolinae
  Moose, Alces americanus  LC (sometimes as Alces alces)
  Mule deer, Odocoileus hemionus  LC
  White-tailed deer, Odocoileus virginianus  LC (Columbian white-tailed deer, O. v. leucurus, and key deer, O. v. clavium: E)
  Caribou, Rangifer tarandus  LC
  (includes migratory woodland caribou, R. t. caribou: E,
  see also: barren-ground caribou, R. t. groenlandicus)
  Family: Antilocapridae (pronghorn)
  Pronghorn, Antilocapra americana  LC (Sonoran pronghorn, A. a. sonoriensis: E)
  Family: Bovidae (cattle, antelope, sheep, goats)
  Subfamily: Bovinae
  American bison, Bison bison  NT (wood bison, B. b. athabascae: T)
  †Bison occidentalis  (E)
  Subfamily: Caprinae
  Muskox, Ovibos moschatus  (Alaska only) LC
  Mountain goat, Oreamnos americanus  LC
  Bighorn sheep, Ovis canadensis  LC (desert bighorn sheep, O. c. nelsoni and Sierra Nevada bighorn sheep, O. c. sierrae: E)
  Dall sheep, Ovis dalli  (Alaska only) LC
caption: Bighorn sheep
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