Fennec fox | |
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Fennec fox in Norfolk Zoo | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Carnivora |
Infraorder: | Cynoidea |
Family: | Canidae |
Subfamily: | Caninae |
Tribe: | Vulpini |
Genus: | Vulpes |
Species: | V. zerda |
Binomial name | |
Vulpes zerda (Zimmermann, 1780) | |
Fennec range |
The fennec fox (Vulpes zerda) is a small fox native to the deserts of North Africa, ranging from Western Sahara and Mauritania 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 fox species. Its coat, ears, and kidney functions have adapted to the desert environment with high temperatures and little water.
The fennec fox mainly eats insects, small mammals and birds. It has a life span of up to 14 years in captivity and about 10 years in the wild. Pups are preyed upon by the Pharaoh eagle-owl; both adults and pups may possibly fall prey to jackals and striped hyenas. Fennec families dig out burrows in the sand for habitation and protection, which can be as large as 120 m2 (1,300 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 fox is currently not threatened by extinction. Knowledge of social interactions is limited to information gathered from captive animals. The fennec fox is commonly trapped for exhibition or sale in North Africa, and it is considered an exotic pet in some parts of the world.
The fennec fox was scientifically described by Eberhardt Zimmermann in 1780. [2] It was originally assigned to the Canis genus, but following molecular analysis it was moved to Vulpes despite it having a few distinct morphological and behavioral traits. [3] According to DNA evidence, the closest living relative to the fennec fox is the Blanford's fox. They are two of eight "desert fox" species, which is a group of Vulpes that share comparable ecologies. The other members include the corsac fox, pale fox, kit fox, Tibetan fox, Ruppell’s fox and cape fox. All eight species evolved to survive in desert environments, developing several traits such as sandy colored coats, large ears, pigmented eyes, and specialized kidneys. [4] The word fennec is derived from the Arabic word fanak which likely has Persian origins. [5]
The fennec fox is one of 13 extant Vulpes species and a member of the family Canidae. [3] The oldest known fossil species within Vulpes is V. riffautae , dating back to the late Miocene of Chad, which is within the Neogene. The deposits where these fossils are found are about 7 million years old, which might make them the earliest Canidae in the Old World. They are estimated to have weighed between 1.5 and 3.5 lb, slightly larger than fennecs. V. skinneri, from the Malapa Fossil Site from South Africa, is younger than V. riffautae by roughly 5 million years, and shows up in the early Pleistocene. [6] [7]
The fennec fox has sand-colored fur which reflects sunlight during the day and helps keep it warm at night. Its nose is black and its tapering tail has a black tip. Its long ears have longitudinal reddish stripes on the back and are so densely haired inside that the external auditory meatus is not visible. [8] The edges of the ears are whitish, but darker on the back. The ear to body ratio is the greatest in the canid family and likely helps in dissipating heat and locating vertebrates. It also has large, dense kidneys with somewhat compact medulla, which help store water in times of scarcity. It has dark streaks running from the inner eye to either side of the slender muzzle. Its large eyes are dark. The dental formula is 3.1.4.23.1.4.3 × 2 = 42 with small and narrow canines. The pads of its paws are covered with dense fur, which facilitates walking on hot, sandy soil. [9] [10] [11]
The fennec fox is the smallest canid species. Females range in head-to-body size from 34.5 to 39.5 cm (13.6 to 15.6 in) with a 23–25 cm (9.1–9.8 in) long tail and 9–9.5 cm (3.5–3.7 in) long ears, and weigh 1–1.9 kg (2.2–4.2 lb). Males are slightly larger, ranging in head-to-body size from 39 to 39.5 cm (15.4 to 15.6 in) with a 23–25 cm (9.1–9.8 in) long tail and 10 cm (3.9 in) long ears, weighing at least 1.3 kg (2.9 lb). [9]
The fennec fox is distributed throughout the Sahara, from Morocco and Mauritania to northern Sudan, through Egypt and its Sinai Peninsula. [1] It inhabits small sand dunes and vast treeless sand areas with sparse vegetation such as grasses, sedges and small shrubs. [9] [12] In the northern part of its range annual rainfalls have been recorded at <100 mm compared to 300 mm in its southern range. The fennec fox's range likely overlaps with that of other canines such as the golden jackal and Rüppell’s fox. Compared to these canids, the fennec fox seems to inhabit areas with more extreme climate and has been known to build burrows in grainier surfaces; this adaptation gives it an edge over competitors. [1]
Fennec foxes are primarily nocturnal, displaying heightened activity during the cooler nighttime hours. [13] This behaviour helps them escape the extreme Saharan heat and reduces water loss through panting. [14] A fennec fox digs its den in sand, either in open areas or places sheltered by plants with stable sand dunes. In compacted soils, dens are up to 120 m2 (1,300 sq ft) large, with up to 15 different entrances. In some cases, different families interconnect their dens, or locate them close together. In soft, looser sand, dens tend to be simpler with only one entrance leading to a single chamber. [9]
Captive individuals reside in family groups consisting of several members. Fennec foxes exhibit playful behavior, especially among younger individuals. [15]
The fennec fox is omnivorous, feeding on small rodents, lizards (geckos and skinks), small birds and their eggs, insects, fruits, leaves, roots and also some tubers. [16] It relies on the moisture content of prey, but drinks water when available. [9] It hunts alone and digs in the sand for small vertebrates and insects. Some individuals were observed to bury prey for later consumption and searching for food in the vicinity of human settlements. [17]
In the Algerian Sahara, 114 scat samples were collected that contained more than 400 insects, plant fragments and date palm (Phoenix dactylifera) fruits, remains of birds, mammals, squamata and insects. [18]
Fennec foxes mate for life. [19] Captive fennec foxes reach sexual maturity at around nine months and mate between January and April. [20] [21] Female fennec foxes are in estrus for an average of 24 hours and usually breed once per year; the copulation tie lasts up to two hours and 45 minutes. [22] Gestation usually lasts between 50 and 52 days, though sometimes up to 63 days. [23] [24] After mating, the male becomes very aggressive and protects the female, and provides her with food during pregnancy and lactation. [25] Females give birth between March and June to a litter of one to four pups that open their eyes after 8 to 11 days. [24] [21] Both female and male care for the pups. They communicate by barking, purring, yapping and squeaking. Pups remain in the family even after a new litter is born. [20] The pups are weaned at the age of 61 to 70 days. [26] Adults rear pups until they are around 16 to 17 weeks old. [19] The average lifespan in the wild is 10 years. [3] The oldest captive male fennec fox was 14 years old, and the oldest female 13 years. [9]
Captive fennec foxes are known to be susceptible to canine distemper virus, displaying fever, mucopurulent ocular discharge, diarrhea, severe emaciation, seizures, generalized ataxia, severe dehydration, brain congestion, gastric ulcers and death. Stress because of capture and long-distance transportation are thought to be the causes. [27] In 2012, a study reported a case of Trichophyton mentagrophytes , a fungus species, in a 2-year-old male. It died not too long after contracting the pathogen from anorexia and icterus. [28] A 2019 review of the deaths of fennec foxes due to medical conditions or pathogens at the Bronx and Prospect Park Zoos since 1980 found that the majority of such deaths were attributed to neoplasia and infection. Most foxes developed infections or medical conditions from atopic dermatitis and other dermatologic dliseases, as well as trauma. [29] Animalia parasites known to infect the fennec fox include Capillaria , [30] Toxoplasma gondii, [31] and Angiostrongylus vasorum. [32]
African horned owl species such as the Pharaoh eagle-owl prey on fennec fox pups. Anecdotal reports exist about jackals and striped hyenas also preying on the fennec fox. But according to nomads, the fennec fox is fast and changes directions so well that even their Salukis are hardly ever able to capture it. [9]
In North Africa, the fennec fox is commonly trapped for exhibition or sale to tourists. Expansion of permanent human settlements in southern Morocco caused its disappearance in these areas and restricted it to marginal areas. Other factors such as roadwork, seismic surveys, mining, oil fields, commercial expansion and the increased number of human communities in their range are cited as potential threats. [1]
As of 2015, the fennec fox is classified as Least concern on the IUCN Red List. [1] It is listed in CITES Appendix II and is protected in Morocco and Western Sahara, Algeria, Tunisia and Egypt, where it has been documented in several protected areas. [1]
The fennec fox is bred commercially as an exotic pet. [17] Commercial breeders remove the pups from their mother to hand-raise them, as tame foxes are more valuable. A breeders' registry has been set up in the United States to avoid any problems associated with inbreeding. [33] One measure taken to conserve the species is the placement of individuals in captive environments such as zoos. Educational programs are also promoted to further this initiative. Due to poor diet, captive foxes have been known to grow to abnormally large sizes. [15]
The fennec fox is the national animal of Algeria. [34] It also serves as the nickname for the Algeria national football team "Les Fennecs". [35]
Canidae is a biological family of dog-like carnivorans, colloquially referred to as dogs, and constitutes a clade. A member of this family is also called a canid. The family includes three subfamilies: the Caninae, and the extinct Borophaginae and Hesperocyoninae. The Caninae are known as canines, and include domestic dogs, wolves, coyotes, foxes, jackals and other species.
The dhole is a canid native to South, East and Southeast Asia. It is anatomically distinguished from members of the genus Canis in several aspects: its skull is convex rather than concave in profile, it lacks a third lower molar and the upper molars possess only a single cusp as opposed to between two and four. During the Pleistocene, the dhole ranged throughout Asia, with its range also extending into Europe but became restricted to its historical range 12,000–18,000 years ago. It is now extinct in Central Asia, parts of Southeast Asia, and possibly the Korean peninsula and Russia.
Foxes are small-to-medium-sized omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull; upright, triangular ears; a pointed, slightly upturned snout; and a long, bushy tail ("brush").
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 all species of the genus, but also appears in the common names of other canid 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. 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 typical lifespan for this genus is between two and four years, but can reach up to a decade.
The maned wolf is a large canine of South America. It is found in Argentina, Brazil, Bolivia, Peru, and Paraguay, and is almost extinct in Uruguay. Its markings resemble those of foxes, but it is neither a fox nor a wolf. It is the only species in the genus Chrysocyon.
The bat-eared fox is a species of fox found on the African savanna. It is the only extant species of the genus Otocyon and an ancient (basal) canid species. Fossil records indicate this canid first appeared during the middle Pleistocene. There are two separate populations of the bat-eared fox, each of which makes up a subspecies. The bat referred to in its colloquial name is possibly the Egyptian slit-faced bat, which is abundant in the region and has very large ears. Other vernacular names include big-eared fox, black-eared fox, long-eared fox, Delalande's fox, cape fox, and motlosi.
Canis is a genus of the Caninae which includes multiple extant species, such as wolves, dogs, coyotes, and golden jackals. Species of this genus are distinguished by their moderate to large size, their massive, well-developed skulls and dentition, long legs, and comparatively short ears and tails.
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 swift fox is a small light orange-tan fox around the size of a domestic cat found in the western grasslands of North America, such as Montana, Colorado, New Mexico, Kansas, Oklahoma and Texas. It also lives in southern Manitoba, Saskatchewan and Alberta in Canada, where it was previously extirpated. It is closely related to the kit fox and some mammalogists classify them as conspecific. However, molecular systematics imply that the two species are distinct. Interbreeding between the two species does occur where their ranges overlap, but this hybridization is quite restricted in scope.
The Bengal fox, also known as the Indian fox, is a fox endemic to the Indian subcontinent from the Himalayan foothills and Terai of Nepal through southern India, and from southern and eastern Pakistan to eastern India and southeastern Bangladesh.
The Cape fox, 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.
The black-backed jackal, also called the silver-backed jackal, is a medium-sized canine native to eastern and southern Africa. These regions are separated by roughly 900 kilometers.
The golden jackal, also called the common jackal, is a wolf-like canid that is native to Eurasia. The golden jackal's coat varies in color from a pale creamy yellow in summer to a dark tawny beige in winter. It is smaller and has shorter legs, a shorter tail, a more elongated torso, a less-prominent forehead, and a narrower and more pointed muzzle than the Arabian wolf. It is listed as Least Concern on the IUCN Red List due to its widespread distribution and high density in areas with plenty of available food and optimum shelter.
The Tibetan fox, also known as the Tibetan sand fox, is a species of true fox endemic to the high Tibetan Plateau, Ladakh plateau, Nepal, China, Sikkim, and Bhutan, up to elevations of about 5,300 m (17,400 ft). It is listed as Least Concern in the IUCN Red List, on account of its widespread range in the Tibetan Plateau's steppes and semi-deserts.
The corsac fox, also known simply as a corsac, is a medium-sized fox found in steppes, semi-deserts and deserts in Central Asia, ranging into Mongolia and northern China. Since 2004, it has been classified as least concern by IUCN, but populations fluctuate significantly, and numbers can drop tenfold within a single year. It is also known as the steppe fox. The word "corsac" is derived from the Russian name for the animal, "korsák" (корса́к), derived ultimately from Turkic "karsak".
The pale fox is a species of fox found in the band of African Sahel from Senegal in the west to Sudan in the east. It is one of the least studied of all canid species, in part due to its remote habitat and its sandy coat that blends in well with the desert-like terrain. The pale fox is distinguished by its light-colored fur and oversized ears, which enable it to excel in camouflage and survival in harsh environments.
Rüppell's fox, also called Rüppell's sand fox, is a fox species living in desert and semi-desert regions of North Africa, the Middle East, and southwestern Asia. It has been listed as Least Concern on the IUCN Red List since 2008. It is named after the German naturalist Eduard Rüppell.
Caninae is the only living subfamily within Canidae, alongside the extinct Borophaginae and Hesperocyoninae. They first appeared in North America, during the Oligocene around 35 million years ago, subsequently spreading to Asia and elsewhere in the Old World at the end of the Miocene, some 7 million to 8 million years ago.
The African wolf is a canine native to North Africa, West Africa, the Sahel, northern East Africa, and the Horn of Africa. It is listed as least concern on the IUCN Red List. In the Middle Atlas in Morocco, it was sighted in elevations as high as 1,800 m (5,900 ft). It is primarily a predator of invertebrates and mammals as large as gazelle fawns, though larger animals are sometimes taken. Its diet also includes animal carcasses, human refuse, and fruit. They are monogamous and territorial; offspring remain with the parents to assist in raising their parents' younger pups.
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