Fauna of the Great Basin

The mustang is a free-roaming horse of the Western United States, descended from horses brought to the Americas by the Spanish conquistadors. Mustangs are often referred to as wild horses, but because they are descended from once-domesticated animals, they are actually feral horses. The original mustangs were Colonial Spanish horses, but many other breeds and types of horses contributed to the modern mustang, now resulting in varying phenotypes. Some free-roaming horses are relatively unchanged from the original Spanish stock, most strongly represented in the most isolated populations.

The ringtail (Bassariscus astutus) is a mammal of the raccoon family native to arid regions of North America. It is widely distributed and well-adapted to its distributed areas. It has been legally trapped for its fur. Globally, it is listed as Least Concern on the IUCN Red List but is a Conservation Strategy Species in Oregon and Fully Protected in California The ringtail is the state mammal of Arizona.

species of mammal

species of mammal

species of bird

species of mammal

species of mammal

species of mammal

species of mammal

species of mammal

species of mammal

species of mammal

species of reptile

species of rodent

species of mammal

species of mammal

species of mammal

species of mammal

species of mammal

species of mammal

species of pocket gopher endemic to the northwestern United States

species of reptile

species of fish

species of reptile

species of amphibian

The cui-ui (Chasmistes cujus) is a large sucker fish endemic to Pyramid Lake and, prior to its desiccation in the 20th century, Winnemucca Lake in northwestern Nevada. It feeds primarily on zooplankton and possibly on nanoplankton (such as algae and diatoms). The maximum size of male cui-ui is approximately and , while females reach approximately and . A cui-ui typically lives for 40 years but does not reach sexual maturity until at least age eight. The cui-ui is an endangered species, and one of the few surviving members of its genus.

species of amphibian

species of amphibian

species of amphibian

species of fish

Warner sucker

species of fish

species of fish

species of fish

species of fish

species of fish

species of reptile

species of insect

species of insect

species of fish

species of fish

species of insect

species of fish

species of fish

species of arachnid

species of fish

species of mammal

species of reptile

species of rodent

species of insect

subspecies of fish