The southern white rhinoceros or southern white rhino (''Ceratotherium simum simum'') is one of the two
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 ...
of the
white rhinoceros
The white rhinoceros, white rhino or square-lipped rhinoceros (''Ceratotherium simum'') is the largest extant species of rhinoceros. It has a wide mouth used for grazing (behaviour), grazing and is the most social of all rhino species. The white ...
(the other being the much rarer
northern white rhinoceros
The northern white rhinoceros or northern white rhino (''Ceratotherium simum cottoni'') is one of two subspecies of the white rhinoceros (the other being the southern white rhinoceros). Formerly found in several countries in East and Central Afr ...
). It is the most common and widespread subspecies of
rhinoceros
A rhinoceros (; ; ), commonly abbreviated to rhino, is a member of any of the five extant species (or numerous extinct species) of odd-toed ungulates in the family Rhinocerotidae. (It can also refer to a member of any of the extinct species o ...
.
A document published by CITES in 2021, found the estimated total population of Southern White Rhino in 2021 to be 15,940 individuals, a decline of 24% since the previous census published in 2015. South Africa remains a stronghold for this subspecies, conserving an estimated 12,968 individuals as of 2021, down 20.22% since the previous census.
Taxonomic and evolutionary history
The southern white rhinoceros is the
nominate 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 ...
; it was given the scientific name ''Ceratotherium simum simum'' by the
English
English usually refers to:
* English language
* English people
English may also refer to:
Peoples, culture, and language
* ''English'', an adjective for something of, from, or related to England
** English national ide ...
explorer
Exploration refers to the historical practice of discovering remote lands. It is studied by geographers and historians.
Two major eras of exploration occurred in human history: one of convergence, and one of divergence. The first, covering most ...
William John Burchell
__NOTOC__
William John Burchell (23 July 1781 – 23 March 1863) was an English explorer, naturalist, traveller, artist, and author. His thousands of plant specimens, as well as field journals from his South African expedition, are held by Ke ...
in the 1810s. The subspecies is also known as Burchell's rhinoceros (''Ceratotherium simum burchellii'') after Burchell and Oswell's rhinoceros (''Ceratotherium simum oswellii'') after
William Cotton Oswell, respectively. However, these are considered synonyms of its original scientific name.
''Ceratotherium simum kiaboaba'' (or ''Rhinoceros kiaboaba''), also known as straight-horned rhinoceros, was proposed as a different subspecies (or species) found near
Lake Ngami
Lake Ngami is an endorheic lake in Botswana north of the Kalahari Desert. It is seasonally filled by the Taughe River, an effluent of the Okavango River system flowing out of the western side of the Okavango Delta. It is one of the fragmented remn ...
and north of the
Kalahari desert
The Kalahari Desert is a large semi-arid sandy savanna in Southern Africa extending for , covering much of Botswana, and parts of Namibia and South Africa.
It is not to be confused with the Angolan, Namibian, and South African Namib coastal de ...
. However, it is now considered part of the southern white rhinoceros.
Following the
phylogenetic species concept
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sex ...
, research in 2010 suggested the southern and
northern white rhinoceros
The northern white rhinoceros or northern white rhino (''Ceratotherium simum cottoni'') is one of two subspecies of the white rhinoceros (the other being the southern white rhinoceros). Formerly found in several countries in East and Central Afr ...
may be different species, rather than subspecies, in which case the correct scientific name for the northern subspecies is ''Ceratotherium cottoni'' and the southern subspecies should be known as simply ''Ceratotherium simum''. Distinct morphological and genetic differences suggest the two proposed species have been separated for at least a million years.
Physical descriptions
![White rhino 2008 08](https://upload.wikimedia.org/wikipedia/commons/d/d5/White_rhino_2008_08.jpg)
The southern white rhinoceros is one of
largest and heaviest land animals in the world. It has an immense body and large head, a short neck and broad chest. Females weigh around and males around .
The head-and-body length is and a shoulder height of .
It has two
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 its snout. The front horn is larger than the other horn and averages in length and can reach .
Females usually have longer but thinner horns than the males, who have larger but shorter ones. The southern white rhinoceros also has a prominent muscular hump that supports its large head. The colour of this animal can range from yellowish brown to slate grey. Most of its body hair is found on the ear fringes and tail bristles, with the rest distributed sparsely over the rest of the body. The southern white rhino has a distinctive flat, broad mouth that is used for
grazing
In agriculture, grazing is a method of animal husbandry whereby domestic livestock are allowed outdoors to roam around and consume wild vegetations in order to convert the otherwise indigestible (by human gut) cellulose within grass and other ...
.Southern white rhinos are strictly herbivores (graminivores) that feed on short grasses.
Mating and reproduction
Little is known about Southern White Rhinoceros mating habits,but females reproduce every 2-3 years.They give birth to a single calf after the gestation period that lasts around 16 months. Newborn calves weigh about 45 kg (100 pounds) at birth. Young usually become independent in 2-3 years.
.
Habitat and distribution
![Rhino Pair at Mosi-Oa-Tuniya](https://upload.wikimedia.org/wikipedia/commons/1/15/Rhino_Pair_at_Mosi-Oa-Tuniya.jpg)
The southern white rhino lives in the
grassland
A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur natur ...
s,
savannahs, and
shrubland
Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes. Shrubland may either occur naturally or be the result of human activity. It m ...
s of southern Africa, ranging from South Africa to
Zambia
Zambia (), officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa, although it is typically referred to as being in Southern Africa at its most cent ...
. About 98.5% of southern white rhino live in just five countries: South Africa,
Namibia
Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and ea ...
,
Zimbabwe
Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and Mozam ...
,
Kenya
)
, national_anthem = "Ee Mungu Nguvu Yetu"()
, image_map =
, map_caption =
, image_map2 =
, capital = Nairobi
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, largest_city = Nairobi
, ...
and
Uganda
}), is a landlocked country in East Africa
East Africa, Eastern Africa, or East of Africa, is the eastern subregion of the African continent. In the United Nations Statistics Division scheme of geographic regions, 10-11-(16*) territor ...
.
The southern white rhino was nearly extinct in the early 20th century, with less than 20 individuals in a single South African reserve. The small population of white rhinoceros slowly recovered over the years, growing to 840 individuals in the 1960s and to 1,000 in the 1980s. White rhino trophy hunting was legalized and regulated in 1968, and after initial miscalculations is now generally seen to have assisted in the species' recovery by providing incentives for landowners to boost rhino populations. In 2001, it was estimated that there were 11,670 white rhinos in the wild of southern Africa with a further 777 individuals in captivity worldwide, making it the most common rhinoceros in the world. By the end of 2007, wild-living southern white rhinos had increased to an estimated 17,480 animals. In 2015, there was an estimated population of 19,682–21,077 in the wild.
[
]
Threats
The southern white rhinoceros is listed as Near Threatened
A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...
; it is mostly threatened by habitat loss, continuous poaching in recent years, and the high illegal demand for rhino horn for commercial purposes and use in traditional Chinese medicine
Traditional Chinese medicine (TCM) is an alternative medical practice drawn from traditional medicine in China. It has been described as "fraught with pseudoscience", with the majority of its treatments having no logical mechanism of action ...
.[
]
Conservation status
Introduction/reintroduction projects
There are smaller reintroduced populations within the historical range of the southern white rhinoceros in Namibia
Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and ea ...
, Botswana
Botswana (, ), officially the Republic of Botswana ( tn, Lefatshe la Botswana, label=Setswana, ), is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory being the Kalahar ...
, Zimbabwe
Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and Mozam ...
, Eswatini
Eswatini ( ; ss, eSwatini ), officially the Kingdom of Eswatini and formerly named Swaziland ( ; officially renamed in 2018), is a landlocked country in Southern Africa. It is bordered by Mozambique to its northeast and South Africa to its no ...
, Zambia
Zambia (), officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa, although it is typically referred to as being in Southern Africa at its most cent ...
and in southwestern Democratic Republic of the Congo
The Democratic Republic of the Congo (french: République démocratique du Congo (RDC), colloquially "La RDC" ), informally Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly and also colloquially Zaire, is a country in ...
, while a small population survives in Mozambique
Mozambique (), officially the Republic of Mozambique ( pt, Moçambique or , ; ny, Mozambiki; sw, Msumbiji; ts, Muzambhiki), is a country located in southeastern Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi ...
. Populations have also been introduced outside of the former range of the species to Kenya
)
, national_anthem = "Ee Mungu Nguvu Yetu"()
, image_map =
, map_caption =
, image_map2 =
, capital = Nairobi
, coordinates =
, largest_city = Nairobi
, ...
, Uganda
}), is a landlocked country in East Africa
East Africa, Eastern Africa, or East of Africa, is the eastern subregion of the African continent. In the United Nations Statistics Division scheme of geographic regions, 10-11-(16*) territor ...
and Zambia
Zambia (), officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa, although it is typically referred to as being in Southern Africa at its most cent ...
, where their northernmost relatives used to occur. The southern white rhinoceros have been reintroduced in the Ziwa Rhino Sanctuary
Ziwa Rhino Sanctuary is a private, non-profit, animal sanctuary in Uganda. Established in 2005 to re-introduce Southern White Rhinos in the wild, the sanctuary is the only place in the country, where one can observe these endangered creatures ...
in Uganda, and in the Lake Nakuru National Park
Lake Nakuru is one of the Rift Valley lakes at an elevation of above sea level. It lies to the south of Nakuru, in the rift valley of Kenya and is protected by Lake Nakuru National Park.
The lake's abundance of algae used to attract a vast qu ...
and the Kigio Wildlife Conservancy in Kenya.
In 2010, nine southern white rhinoceros were imported from South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...
and shipped to the Yunnan province
Yunnan , () is a landlocked province in the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is Kunming. The province borders the C ...
from southeast China
The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each se ...
where they were kept in an animal wildlife park for acclimation. In March 2013, seven of the animals were shipped to the Laiyanghe National Forest Park, a habitat where Sumatran and Javan rhinoceros
The Javan rhinoceros (''Rhinoceros sondaicus''), also known as the Javan rhino, Sunda rhinoceros or lesser one-horned rhinoceros, is a very rare member of the family Rhinocerotidae and one of five extant rhinoceroses. It belongs to the same ge ...
once lived. Two of the southern white rhinos began the process of being released into the wild on May 13, 2014.
In captivity
Wild-caught southern white rhinoceros will readily breed in captivity given appropriate amounts of space and food, as well as the presence of other female rhinos of breeding age. Many rhinoceros living in zoos today are a part of a cooperative breeding program to increase population numbers and maintain genetic diversity without pulling individuals from the wild. For instance, 96 calves have been born at the San Diego Zoo Safari Park
The San Diego Zoo Safari Park, originally named the San Diego Wild Animal Park until 2010, is an 1,800 acre (730 ha) zoo in the San Pasqual Valley area of San Diego, California, near Escondido. It is one of the largest tourist attractions in S ...
since 1972. However, the rate of reproduction is fairly low among captive-born southern white females, potentially due to their diet. Ongoing research through San Diego Zoo Global
San Diego Zoo Wildlife Alliance is a not-for-profit organization headquartered in San Diego that operates the San Diego Zoo and the San Diego Zoo Safari Park. Founded in 1916 as the Zoological Society of San Diego under the leadership of Harry M. ...
is hoping to not only focus on this, but also on identifying other captive species that are possibly affected and developing new diets and feeding practices aimed at enhancing fertility. When managed correctly the rate of natural reproduction among captive-born southern white females is relatively good as can be seen by the success of John Frederik Hume's rhino breeding initiative, which currently has an average of 200 natural births per year and has seen more than 1800 natural births since 1993. In South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...
a population of southern white rhinos are being raised on farm
A farm (also called an agricultural holding) is an area of land that is devoted primarily to agricultural processes with the primary objective of producing food and other crops; it is the basic facility in food production. The name is used fo ...
s and ranch
A ranch (from es, rancho/Mexican Spanish) is an area of land, including various structures, given primarily to ranching, the practice of raising grazing livestock such as cattle and sheep. It is a subtype of a farm. These terms are most often ...
es for their horns along with the black rhino
The black rhinoceros, black rhino or hook-lipped rhinoceros (''Diceros bicornis'') is a species of rhinoceros, native to eastern and southern Africa including Angola, Botswana, Kenya, Malawi, Mozambique, Namibia, South Africa, Eswatini, Tanzania ...
.
References
Notes
External links
{{Taxonbar, from=Q5762455
Rhinoceroses
Mammals described in 1817
Mammals of South Africa
Mammals of Zimbabwe
Mammals of Botswana
Mammals of Namibia
Mammals of Zambia