The kit fox is a fox species that inhabits arid and semi-arid regions of the southwestern United States and northern and central Mexico. These foxes are the smallest of the four species of Vulpes occurring in North America and are among the smallest of the vulpines worldwide. It has also been called a North American counterpart of the fennec fox due to its large ears.

The San Joaquin kit fox is an endangered species of fox that was formerly very common in the San Joaquin Valley and much of Central California. As an opportunistic hunter, the San Joaquin kit fox primarily preys on kangaroo rats but also targets white-footed mice, pocket mice, ground squirrels, rabbits, and ground-nesting birds. During certain times of the year, especially when other food sources might be scarce, it will also consume insects. Its 1990 population was estimated to be 7,000. This subspecies is still endangered, after nearly 50 years of being on the Endangered Species List. Officially this subspecies was listed March 3, 1967. On September 26, 2007, Wildlands Inc. announced the designation of the 684-acre (2.77 km2) Deadman Creek Conservation Bank, which is intended specifically to protect habitat of the San Joaquin kit fox. However, the population continues to decline mostly due to heavy habitat loss. Other factors include competition from red fox, and the extermination of the gray wolf from California has left the coyote as the dominant meso-predator in kit fox territory bringing an imbalance in ecosystem relationships. Sarcoptic mange has also constituted a significant threat, specifically to the Bakersfield population of the subspecies, with 15 confirmed cases reported by the end of 2014.