Rüppell's Fox
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Rüppell's fox (''Vulpes rueppellii''), also called Rüppell's sand fox, is a
fox 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 (or ''brush''). Twelve sp ...
species living in
desert A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About on ...
and semi-desert regions of
North Africa North Africa, or Northern Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region, and it is sometimes defined as stretching from the Atlantic shores of Mauritania in ...
, the
Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabian Peninsula, Arabia (including the Arabian Peninsula and Bahrain), Anatolia, Asia Minor (Asian part of Turkey except Hatay Pro ...
, and south
western Asia Western Asia, West Asia, or Southwest Asia, is the westernmost subregion of the larger geographical region of Asia, as defined by some academics, UN bodies and other institutions. It is almost entirely a part of the Middle East, and includes Ana ...
. It has been listed as
Least Concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...
on the
IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...
since 2008. It is named after the German naturalist
Eduard Rüppell Wilhelm Peter Eduard Simon Rüppell (20 November 1794 – 10 December 1884) was a German Natural history, naturalist and List of explorers, explorer. Rüppell is occasionally transliterated to "Rueppell" for the English alphabet, due to german ort ...
.


Description

Rüppell's fox is a small fox, measuring in total length, including a tail measuring long. There is no pronounced sexual dimorphism, but males appear slightly larger than females. Both sexes are reported to have an average weight of . Their coat is sandy with some brown, ticked with numerous white hairs, and fading from reddish along the middle of the back to pure white on the animal's underparts and on the tip of its tail. The flanks are also paler. The head has a more rusty tone on the muzzle and forehead, with dark brown patches on the sides of the muzzle, stretching up towards the eyes. The chin and the sides of the face are white. The whiskers are long, reaching . Its relatively small legs are beige in color, with individual black hairs that turn lighter to white towards the legs. The soles are heavily coated with fur that fully covers the pads, an adaptation to extremes of temperature in the desert, that probably helps to distribute its weight and move easily on sand. The back has a black speckling, resulting in a thick black patch at the base of the tail, which is bushy with a white tip. The fur is very soft and fluffy in two coats, a heavier denser winter coat and a thinner summer coat. The females have three pairs of
mammae A mammary gland is an exocrine gland in humans and other mammals that produces milk to feed young offspring. Mammals get their name from the Latin word ''mamma'', "breast". The mammary glands are arranged in organs such as the breasts in primat ...
. Similar to other desert-dwelling foxes, Rüppell's fox has large ears to cool it off. Although adults are too large to confuse with
fennec fox 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 ...
es, which live in the same area, young Rüppell's foxes can be confused with adults of that species. The larger ears, however, make them easy to distinguish from
red Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and a secondar ...
and
pale fox The pale fox (''Vulpes pallida'') 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 th ...
es, which also live in some of the same areas. In addition, the coat of a Rüppell's fox is much paler than that of a red fox, while pale foxes lack the white tips on their tails. Rüppell's fox has 2n = 40 chromosomes.


Distribution and habitat

Rüppell's fox is found in the deserts of North Africa south of the
Atlas Mountains The Atlas Mountains are a mountain range in the Maghreb in North Africa. It separates the Sahara Desert from the Mediterranean Sea and the Atlantic Ocean; the name "Atlantic" is derived from the mountain range. It stretches around through Moroc ...
, from
Mauritania Mauritania (; ar, موريتانيا, ', french: Mauritanie; Berber: ''Agawej'' or ''Cengit''; Pulaar: ''Moritani''; Wolof: ''Gànnaar''; Soninke:), officially the Islamic Republic of Mauritania ( ar, الجمهورية الإسلامية ...
and
Morocco Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to ...
in the west to Egypt and
Djibouti Djibouti, ar, جيبوتي ', french: link=no, Djibouti, so, Jabuuti officially the Republic of Djibouti, is a country in the Horn of Africa, bordered by Somalia to the south, Ethiopia to the southwest, Eritrea in the north, and the Red ...
in the east. The species is also found in
Algeria ) , image_map = Algeria (centered orthographic projection).svg , map_caption = , image_map2 = , capital = Algiers , coordinates = , largest_city = capital , relig ...
, central
Niger ) , official_languages = , languages_type = National languagesLibya Libya (; ar, ليبيا, Lībiyā), officially the State of Libya ( ar, دولة ليبيا, Dawlat Lībiyā), is a country in the Maghreb region in North Africa. It is bordered by the Mediterranean Sea to the north, Egypt to Egypt–Libya bo ...
, northern
Chad Chad (; ar, تشاد , ; french: Tchad, ), officially the Republic of Chad, '; ) is a landlocked country at the crossroads of North and Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic ...
,
Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Mediter ...
, southern
Sudan Sudan ( or ; ar, السودان, as-Sūdān, officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a country in Northeast Africa. It shares borders with the Central African Republic t ...
, the arid lowlands of
Ethiopia Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢትዮጵያ, Ítiyop'iya, aa, Itiyoppiya officially the Federal Democratic Republic of Ethiopia, is a landlocked country in the Horn of Africa. It shares borders with Eritrea to the ...
and northern
Somalia Somalia, , Osmanya script: 𐒈𐒝𐒑𐒛𐒐𐒘𐒕𐒖; ar, الصومال, aṣ-Ṣūmāl officially the Federal Republic of SomaliaThe ''Federal Republic of Somalia'' is the country's name per Article 1 of thProvisional Constituti ...
. It is common in Arabia, except on the coast of the Red Sea and in the mountainous outskirts. It is also found in the
Arabian Peninsula The Arabian Peninsula, (; ar, شِبْهُ الْجَزِيرَةِ الْعَرَبِيَّة, , "Arabian Peninsula" or , , "Island of the Arabs") or Arabia, is a peninsula of Western Asia, situated northeast of Africa on the Arabian Plate ...
southwards from
Syria Syria ( ar, سُورِيَا or سُورِيَة, translit=Sūriyā), officially the Syrian Arab Republic ( ar, الجمهورية العربية السورية, al-Jumhūrīyah al-ʻArabīyah as-Sūrīyah), is a Western Asian country loc ...
,
Israel Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated ...
,
Jordan Jordan ( ar, الأردن; tr. ' ), officially the Hashemite Kingdom of Jordan,; tr. ' is a country in Western Asia. It is situated at the crossroads of Asia, Africa, and Europe, within the Levant region, on the East Bank of the Jordan Rive ...
and
Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq ...
, and as far east as
Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...
,
Pakistan Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's List of countries and dependencies by population, fifth-most populous country, with a population of almost 24 ...
, and
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is bordere ...
. Within this region, it prefers sandy or rocky deserts, but may also be found in semiarid steppes and sparse scrub. It is assumed that the distribution areas have changed historically with
desertification Desertification is a type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly arid. It is the spread of arid areas caused by ...
and are mainly limited by competition with the
red fox The red fox (''Vulpes vulpes'') is the largest of the true foxes and one of the most widely distributed members of the Order (biology), order Carnivora, being present across the entire Northern Hemisphere including most of North America, Europe ...
(''Vulpes vulpes'') and by human settlements. In 2007, an expansion of the occurrence of foxes in the
United Arab Emirates The United Arab Emirates (UAE; ar, اَلْإِمَارَات الْعَرَبِيَة الْمُتَحِدَة ), or simply the Emirates ( ar, الِْإمَارَات ), is a country in Western Asia (The Middle East). It is located at th ...
was documented through the first sighting of the species in Al Dhafra in the
Emirate of Abu Dhabi The Emirate of Abu Dhabi (, , or ; ar, إِمَارَةْ أَبُوظَبِي , ) is one of seven emirates that constitute the United Arab Emirates (UAE). It is by far the largest emirate, accounting for 87% of the nation's total land area o ...
. It seems to avoid the extreme arid regions in the middle of the Sahara, being more abundant on the fringes, in mountain massifs and near oases. Annual rainfall in the region of distribution of the species is normally between 100 and a maximum of 240 mm per year, mostly on the northern edge of the Sahara with a maximum of 150 mm per year. In Tunisia, the Rüppell's fox occurs in the Saharan habitat in Jebil National Park and possibly farther to the south-west.


Behavior and ecology

Rüppell's foxes are monogamous and either
crepuscular In zoology, a crepuscular animal is one that is active primarily during the twilight period, being matutinal, vespertine, or both. This is distinguished from diurnal and nocturnal behavior, where an animal is active during the hours of daylig ...
or
nocturnal Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed sens ...
. They usually spend the day resting in their underground dens, but in winter they are occasionally active during the day. In Tunisia's Jebil National Park, recent research has shown a prodominently nocturnal activity pattern with very rare crepuscular observations preceding sunrise. They use two different types of burrows, which are strictly separated: the breeding dens and the resting dens. Outside of the breeding season, these are small dens that can hold only one adult fox, and the fox changes dens frequently, on average about every 4.7 days. Breeding dens are larger, and occupied by a pair of adults and their kits. Such dens can sometimes have more than one entrance, although this is unusual. They make a series of short barks during mating and, at other times, can also produce hisses, trills, and sharp whistles. They have been reported to wag their tails, like domestic dogs. Rüppell's foxes occupy distinct territories, which they mark with urine, but not with dung as red foxes do. The territories of the members of a mated pair overlap almost completely, but are entirely separate from those of any neighboring pairs. These territories are maintained throughout the year, although the pair occupy separate dens outside of the mating season. The size of the territories varies with the local terrain, but has been reported as around in
Oman Oman ( ; ar, عُمَان ' ), officially the Sultanate of Oman ( ar, سلْطنةُ عُمان ), is an Arabian country located in southwestern Asia. It is situated on the southeastern coast of the Arabian Peninsula, and spans the mouth of t ...
, with those of males being larger, on average, than those of females. The foxes range widely during their nocturnal foraging, travelling over in a night. Its only natural predators are the
steppe eagle The steppe eagle (''Aquila nipalensis'') is a large bird of prey. Like all eagles, it belongs to the family Accipitridae. The steppe eagle's well-feathered legs illustrate it to be a member of the subfamily Aquilinae, also known as the "booted ...
and the eagle-owl.


Diet

Rüppell's foxes are
omnivore An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutr ...
s, with a diet that varies considerably depending on what is locally available. In some regions, they are reported to be mainly insectivorous, especially feeding on beetles and
orthoptera Orthoptera () is an order of insects that comprises the grasshoppers, locusts, and crickets, including closely related insects, such as the bush crickets or katydids and wētā. The order is subdivided into two suborders: Caelifera – grassho ...
ns, while in others, small mammals, lizards, and birds form a larger part of their diet. Plants eaten include grasses and desert
succulent In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word ''succulent'' comes from the Latin word ''sucus'', meani ...
s, along with fruits such as dates, and they have also been known to scavenge from human garbage.


Reproduction

Mating occurs in November, a few weeks after the female has prepared her breeding den. Litters up to six kits, although more usually just two or three, are born after a
gestation period In mammals, pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation. It begins when a fertilized zygote implants in the female's uterus, and ends once it ...
around 52–53 days. The young are born blind. They reach independence at about four months, when they may travel up to in search of a suitable territory. They can live an average of seven years in the wild, but have been reported to live up to 12 years in captivity.


Subspecies

Although some authors consider Rüppell's fox to be
monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...
, others list up to five
subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...
: *''V. r. caesia'' *''V. r. cyrenaica'' *''V. r. rueppelli'' *''V. r. sabaea'' *''V. r. zarudneyi''


Philately

The Libyan General Posts and Telecommunications Company (GPTC), in cooperation with the
World Wide Fund for Nature The World Wide Fund for Nature Inc. (WWF) is an international non-governmental organization founded in 1961 that works in the field of wilderness preservation and the reduction of human impact on the environment. It was formerly named the Wor ...
, dedicated a postal stamp issue to Rüppell's fox on May 1, 2008. The issue is made of a set of four stamps printed in minisheets of two sets. The issue was completed with a special
first day of issue A first day of issue cover or first day cover (FDC) is a postage stamp on a cover, postal card or stamped envelope franked on the first day the issue is authorized for useBennett, Russell and Watson, James; ''Philatelic Terms Illustrated'', Stanl ...
cover having a special postmark.


References


External links


Picture of Rüppell's fox near Lake Nasser, Egypt.Rüppell's fox postal stamps on YouTubeThe 4 fox species
of the
UAE The United Arab Emirates (UAE; ar, اَلْإِمَارَات الْعَرَبِيَة الْمُتَحِدَة ), or simply the Emirates ( ar, الِْإمَارَات ), is a country in Western Asia (The Middle East). It is located at th ...
(
Gulf News ''Gulf News'' is a daily English language newspaper published from Dubai, United Arab Emirates. It was first launched in 1978, and is currently distributed throughout the UAE and also in other Persian Gulf Countries. Its online edition was launch ...
) {{Authority control
Rüppell's fox Rüppell's fox (''Vulpes rueppellii''), 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 ...
Mammals of Western Asia Mammals of North Africa Mammals of Pakistan Mammals of the Middle East Mammals of Eritrea Fauna of the Sahara Carnivorans of Africa
Rüppell's fox Rüppell's fox (''Vulpes rueppellii''), 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 ...