Tribe Vulpini the Foxes Genus Vulpes & Otocyon

Vulpini is a taxonomic rank which represents the fox-like tribe of the subfamily Caninae (the canines), and is sister to the dog-like tribe Canini Vulpes is a genus of the sub-family Caninae. The members of this genus are colloquially referred to as true foxes, meaning they form a proper clade. The word "fox" occurs in the common names of species. True foxes are distinguished from members of the genus Canis, such as domesticated dogs, wolves, jackals and coyotes, by their smaller size (5–11 kg), longer, bushier tail, and flatter skull.[3] They have black, triangular markings between their eyes and nose, and the tip of their tail is often a different color from the rest of their pelt.

The following species have galleries on this page:

  • The Bat-eared Fox (Otocyon megalotis)

  • East African Bat-eared Fox (Otocyon megalotis virgatus)

  • Peninsular Desert Kit Fox (Vulpes macrotis macrotis)

  •  Fennec Fox (Canis zerda)

  • San Joaquin Valley Kit Fox (Vulpes macrotis mutica)

The Bat-eared Fox (Otocyon megalotis) is a species of fox found on the African savanna. It is the only extant species of the genus Otocyon and considered a basal canid species. Fossil records indicate this canid first appeared during the middle Pleistocene.

It is named for its large ears, which have a role in thermoregulation. The bat referred to in its colloquial name is possibly the Egyptian slit-faced bat (Nycteris thebaica), which is abundant in the region and has very large ears. Although not commonly used, other vernacular names include big-eared fox, black-eared fox, long-eared fox, Delalande's fox, cape fox, and motlosi.

The bat-eared fox is the only living species of the genus Otocyon. Its scientific name, given by Anselme Gaëtan Desmarest, was initially Canis megalotis (due to its close resemblance to jackals), and later changed by Salomon Müller which placed it in its own genus, Otocyon; its huge ears and different dental formula warrant inclusion in a genus distinct from both Canis and true foxes (Vulpes). The generic name Otocyon is derived from the Greek words otus for ear and cyon for dog, while the specific name megalotis comes from the Greek words mega for large and otus for ear.

Due to its different dentition, the bat-eared fox was previously placed in a distinct subfamily of canids, Otocyoninae, as no relationship to any living species of canid could be established. However, according to more recent examinations, this species is regarded as having affinities with the vulpine line, and Otocyon was placed with high confidence as sister to the clade containing both the raccoon dog (Nyctereutes) and true foxes (Vulpes), occupying a basal position within Canidae.

Currently, there are two recognized subspecies:

  • Otocyon megalotis megalotis (Desmarest, 1822) — found in southern Africa

  • Otocyon megalotis virgatus (Cabrera, 1910) — found in eastern Africa

South African Bat-eared Fox (Otocyon megalotis megalotis)

 

East African Bat-eared Fox (Otocyon megalotis virgatus) - seen in Shaba Reserve in the early 90’s and Ethiopia later. Scanned Slides

The Cape Fox (Vulpes chama), also called the asse, cama fox or the silver-backed fox, is a small species of fox, native to southern Africa. It is also called a South African version of a fennec fox due to its similarly big ears. It is the only "true fox" occurring in sub-Saharan Africa, and it retains primitive characteristics of Vulpes because it diverged early in the evolutionary history of the group.

Vulpes chama is a small-built canid, usually measuring 45 to 62 cm (17.5 to 24.5 in) long, not including its tail, which is typically 30 to 40 cm (12 to 15.5 in). It is 30 to 35 cm (12 to 14 in) tall at the shoulder, and usually weighs from 2.5 to 4.5 kg (5.5 to 9.9 lb). The skull is very similar to that of V. bengalensis, although the cranium of V. chama is slightly wider and the maxillary region is slightly shorter.

The ears are relatively large and sharp, the muzzle is small and pointed. Pelage colour is silvery-gray, tawny at the back of the ears, with white hairs appearing around the side of the pinna in the center. The colour of the neck and sides is lighter, and the underparts are pale tawny to pale buff. The head is dull red and the lower jaw is dark brown. There are white marks on the throat. The legs are more tawny than the rest of the body. The tail is dense and bushy, and can be silvery, pale fawn, buff with brown or black tips, or dull yellow. The tail tip is always black, and there's a dark spot over the caudal gland.

Pelage is soft and composed of a thick wavy underfur of around 25 mm in length. Underfur is covered with a dense layer of guard hair < 40 mm in thickness. Molt occurs in the wet season from October to November. V. chama presents little to no sexual dimorphism.

Cape fox is the only species in the genus Vulpes that exists in Africa south of the equator. It primarily occupies arid and semi-arid areas, but in sections, such as the fynbos biome of the western Cape Province of South Africa, the species reaches areas of higher rainfall and denser vegetation. In the central and western regions of southern Africa, the species is widespread, reaching around 15 ° N in south-western Angola. It is widespread in Zimbabwe, Botswana, and South Africa, occurring in most parts of the Western and Northern Cape provinces, the Eastern Cape (excluding the southeastern side), the Free State, western and northwestern KwaZulu-Natal and the North-West province. It also occurs in Lesotho, a high mountainous region.

Cape Fox (Vulpes chama) - Soussevlei Namibia, Namib Naukluft

The Kit Fox (Vulpes macrotis) 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.

Some mammalogists classify it as conspecific with the swift fox, V. velox, but molecular systematics imply that the two species are distinct. Interbreeding between the two species does occur where their ranges overlap (eastern New Mexico and western Texas), but this hybridization is quite restricted in scope.

Subspecific designations for the species are not fully addressed. As many as eight subspecies have been recognized, although further analyzes have not found support for any subspecies differentiation. However, although there is a clear need for more subspecific clarification, most available data suggest that kit foxes in the San Joaquin Valley of California are likely to warrant a subspecific designation, V. m. mutica, due to geographical isolation, and that any other kit foxes may be included in a second subspecies, V. m. macrotis.

Subspecies

The endangered San Joaquin kit fox (Vulpes macrotis mutica) was formerly very common in the San Joaquin Valley and through much of Central California. 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 (277 ha) 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 foxes and the extermination of the wolf from California, which has left the coyote as the dominant meso-predator in kit fox territory, bringing an imbalance in ecosystem relationships.

Peninsular Desert Kit Fox (Vulpes macrotis macrotis) - Baja California Laguna San Ignacio

 The endangered San Joaquin kit fox (Vulpes macrotis mutica) was formerly very common in the San Joaquin Valley and through much of Central California. 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.

San Joaquin Valley Kit Fox (Vulpes macrotis mutica) - Carrizo Plains National Monument

The fennec fox (Vulpes zerda) is a small crepuscular fox native to the deserts of North Africa, ranging from Western Sahara to the Sinai Peninsula. Its most distinctive feature is its unusually large ears, which serve to dissipate heat and listen for underground prey. The fennec is the smallest species of fox. Its coat, ears, and kidney functions have adapted to the desert environment with high temperatures and little water. It mainly eats insects, small mammals, and birds. The fennec has a life span of up to 14 years in captivity and about 10 years in the wild. Its main predators are the Verreaux's eagle-owl, jackals, and other large mammals. Fennec families dig out burrows in the sand for habitation and protection, which can be as large as 120 m2 (1,292 sq ft) and adjoin the burrows of other families. Precise population figures are not known but are estimated from the frequency of sightings; these indicate that the fennec is currently not threatened by extinction. Knowledge of social interactions is limited to information gathered from captive animals. The fennec's fur is prized by the indigenous peoples of North Africa, and in some parts of the world, it is considered an exotic pet.

 Fennec Fox (Canis zerda) - Captive pet in Douz Tunisia at the Douz Market