The rhim gazelle or rhim (''Gazella leptoceros''), also known as the slender-horned gazelle, African sand gazelle or Loder's gazelle, is a pale-coated

gazelle A gazelle is one of many antelope species in the genus ''Gazella'' . This article also deals with the seven species included in two further genera, '' Eudorcas'' and '' Nanger'', which were formerly considered subgenera of ''Gazella''. A third ...

with long slender horns and well adapted to desert life. It is considered an endangered species because fewer than 2500 are left in the wild. They are found in

Algeria ) , image_map = Algeria (centered orthographic projection).svg , map_caption = , image_map2 = , capital = Algiers , coordinates = , largest_city = capital , relig ...

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 Medit ...

Tunisia ) , image_map = Tunisia location (orthographic projection).svg , map_caption = Location of Tunisia in northern Africa , image_map2 = , capital = Tunis , largest_city = capital , ...

and

Libya 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 the east, Suda ...

, and possibly Chad,

Mali Mali (; ), officially the Republic of Mali,, , ff, 𞤈𞤫𞤲𞥆𞤣𞤢𞥄𞤲𞤣𞤭 𞤃𞤢𞥄𞤤𞤭, Renndaandi Maali, italics=no, ar, جمهورية مالي, Jumhūriyyāt Mālī is a landlocked country in West Africa. Mal ...

Niger ) , official_languages = , languages_type = National languagesSudan.

Name

According to

Richard Lydekker Richard Lydekker (; 25 July 1849 – 16 April 1915) was an English naturalist, geologist and writer of numerous books on natural history. Biography Richard Lydekker was born at Tavistock Square in London. His father was Gerard Wolfe Lydekker, ...

, the name ''rhim'' is

Algerian Arabic Algerian Arabic (natively known as Dziria) is a dialect derived from the form of Arabic spoken in northern Algeria. It belongs to the Maghrebi Arabic language continuum and is partially mutually intelligible with Tunisian and Moroccan. Like ...

, while in Tunisian and

Egyptian Egyptian describes something of, from, or related to Egypt. Egyptian or Egyptians may refer to: Nations and ethnic groups * Egyptians, a national group in North Africa ** Egyptian culture, a complex and stable culture with thousands of years of ...

the animal is known as the ''ghazal abiad'', "white gazelle", owing to its pale coat. The name ''rhim'' is cognate with and perhaps derived from the

Hebrew Hebrew (; ; ) is a Northwest Semitic language of the Afroasiatic language family. Historically, it is one of the spoken languages of the Israelites and their longest-surviving descendants, the Jews and Samaritans. It was largely preserved ...

term ''

re'em A re'em, also reëm ( he, רְאֵם), is an animal mentioned nine times in the Hebrew Bible. Job , Deuteronomy , Numbers and ; Psalms , and ; and Isaiah . It has been translated as "unicorn" in the King James Version, and in some Christian Bi ...

'' found in the

Bible The Bible (from Koine Greek , , 'the books') is a collection of religious texts or scriptures that are held to be sacred in Christianity, Judaism, Samaritanism, and many other religions. The Bible is an anthologya compilation of texts ...

, which may refer to an aurochs,

oryx ''Oryx'' is a genus consisting of four large antelope species called oryxes. Their pelage is pale with contrasting dark markings in the face and on the legs, and their long horns are almost straight. The exception is the scimitar oryx, which ...

or perhaps a

unicorn The unicorn is a legendary creature that has been described since antiquity as a beast with a single large, pointed, spiraling horn projecting from its forehead. In European literature and art, the unicorn has for the last thousand years o ...

.. Although described and named by

Frédéric Cuvier Georges-Frédéric Cuvier (28 June 1773 – 24 July 1838) was a French zoologist and paleontologist. He was the younger brother of noted naturalist and zoologist Georges Cuvier. Career Frederic was the head keeper of the menagerie at the Musé ...

in 1842, the rhim gazelle was rediscovered by

Edmund Giles Loder Sir Edmund Giles Loder, 2nd Baronet (7 August 1849 – 14 April 1920) was an English aristocrat, landowner and plantsman. Biography Early life Edmund Giles Loder was born on 7 August 1849 in London, England. His father was Sir Robert Loder, 1st B ...

later in the same century, hence the synonym ''Gazella loderi'' and the common name Loder's gazelle.

Description

The contemporary land mammals of Egypt (including Sinai) (1980) Fig

Growing to a length of , this is the palest of the gazelles, and well adapted to desert life in many ways. The upper parts are pale buff or cream and the limbs and under parts white or pale buff. The

horns Horns or The Horns may refer to: * Plural of Horn (instrument), a group of musical instruments all with a horn-shaped bells * The Horns (Colorado), a summit on Cheyenne Mountain * ''Horns'' (novel), a dark fantasy novel written in 2010 by Joe Hill ...

on the male are slender and slightly S-shaped; those of the female are even thinner, lighter and nearly straight. There are faint facial markings and an indistinct stripe along the side. The tail is brownish-black, about long, and contrasts with the pale rump.

Distribution and habitat

The rhim gazelle is known from Algeria, Tunisia, Libya and Egypt. It has also been reported from Niger and Chad, but these sightings seem doubtful and its precise range is unclear. The rhim gazelle is found in isolated pockets across the central

Sahara Desert , photo = Sahara real color.jpg , photo_caption = The Sahara taken by Apollo 17 astronauts, 1972 , map = , map_image = , location = , country = , country1 = , ...

. The extreme heat of this environment limits their feeding to the early morning and evening, and ''G. leptoceros'' gains most of its water requirements from dew and plant moisture, relying little on open water sources. The rhim gazelle is a nomadic species, moving across its desert range in search of vegetation, though it does not have a set migratory pattern. Its typical habitat is sand dunes and the depressions between them and other sandy areas, but also rocky areas.

Physiological Adaptations

Rhim gazelles use a special type of temperature regulation called

heterothermy Heterothermy or heterothermia (from Greek ἕτερος ''heteros'' "other" and θέρμη ''thermē'' "heat") is a physiological term for animals that vary between self-regulating their body temperature, and allowing the surrounding environment t ...

to survive in this harsh desert climate. With heterothermy, animals no longer keep their body temperature within a narrow range. Heterothermy in Rhim gazelles results in an increase in body temperature during the heat of the day that reduces the amount of evaporative cooling that gazelles would need to do in order to stay cool. By reducing evaporative cooling, gazelles reduce energy expenditure and conserve body water. During cooler temperatures at night, the stored heat can be released, allowing the gazelles’ body temperature to decrease back to a normal physiological range. Rhim gazelles maintain a normal skin temperature of about 35-°C in the summer and about 25-°C in the winter. When heterothermy is employed, the gazelle experiences a body temperature increase of 5-20°C depending on seasonal conditions.

Status

Endangered by the early 1970s, this species of gazelle was in serious decline. They were hunted firstly by mounted then by motorized hunters for sport, meat, or their horns, which were sold as ornaments in North African markets. The threats the animals face now include poaching, disturbance by humans and loss of suitable habitat. The

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of nat ...

estimates there may only be 300 to 600 mature individuals in the wild, and has rated their conservation status as "

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...

In philately

On February 1, 1987, the Libyan General Posts and Telecommunications Company, in cooperation with

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 ...

, issued a set of four postage stamps illustrating ''Gazella leptoceros''.Libyan Stamps online

References

External links

*ARKive
Images and movies of the rhim gazelle ''(Gazella leptoceros)''Rhim gazelle's postal stamps on YouTube
{{Taxonbar, from=Q838554

rhim gazelle The rhim gazelle or rhim (''Gazella leptoceros''), also known as the slender-horned gazelle, African sand gazelle or Loder's gazelle, is a pale-coated gazelle with long slender horns and well adapted to desert life. It is considered an endangered ...

Antelopes of North Africa Mammals of Chad Mammals of West Africa Fauna of the Sahara Fauna of Egypt Mammals of North Africa