![]() ![]() Similarly to our hair and nails, a rhino’s horns will continue to grow throughout their life, extending by up to eight centimetres per year, and can reach lengths of 150 centimetres. Oftentimes confused as ivory, which is derived from elephant trunks, rhino horns are actually made of thousands of fine, compressed strands of keratin. In rare instances, some black rhinos develop an additional posterior horn, although it is much smaller than the two principal horns. For most fully-grown individuals, the anterior horn is typically longer than its posterior horn. Horn size also differs between genders, with males carrying thicker horns and females displaying thinner, longer ones. The unique lip shape of each species is an evolutionary adaptation to suit their distinctive feeding habits.īlack rhinos are one of three species of rhinoceros that have two horns, which can vary in shape and size depending on geographical location. Whilst the white rhino has a wide, square-shaped lip, the black rhino instead sports a pointed, prehensile upper lip (hence the common reference of square-lipped rhinos and hook-lipped rhinos). ![]() The key distinguishing feature between the two species is actually the shape of their mouths. Adults reach a height of 1.6 metres and a weight of 900-1,350 kilograms, and usually have a smaller head and neck hump than their “white” counterparts.ĭespite their nomenclature, black and white rhinos are both dark grey in colour although their tendency to wallow in dirt, mud and dust, which varies in soil condition throughout native rhino habitats, can cause a slight difference in skin colour. ![]() Of the two African rhinoceros species, the black rhino is the smaller kind. Us.: Diceros bicornis minor (Southern Central black rhino), Diceros bicornis bicornis (South Western black rhino), Diceros bicornis michaeli (East African black rhino) ↑ Knight, Matthew () Western black rhino declared extinct.Cite has empty unkent parameter: |last-author-amp= ( help) CS1 maint: ref=harv ( link) Internaitional Union for Conservation o Naitur. "Historical distribution of the black rhinoceros ( Diceros bicornis) in West Africa" (PDF). Cite uses deprecated parameter |lastauthoramp= ( help) The IUCN Red List of Threatened Species doi: 10.2305/IUCN.UK. The species oweraw is classifee'd as critically endangered, an ane subspecies, the wastren black rhinoceros, wis declared extinct bi the IUCN in 2011. These species are nou whiles referred tae as the square-lipped (for white) or huik-lipped (for black) rhinoceros. The wird "white" in the name "white rhinoceros" is a misinterpretation o the Afrikaans wird wyd, itself derived frae the Dutch wird wijd for wide, referrin tae its square upper lip, as opponed tae the pyntit or huiked lip o the black rhinoceros. The ither African rhinoceros is the white rhinoceros ( Ceratotherium simum). ![]() Altho the rhinoceros is referred tae as black, its colours vary frae broun tae gray. The black rhinoceros or hook-lipped rhinoceros ( Diceros bicornis) is a species o rhinoceros, hamelt in eastren an central Africae includin Kenyae, Tanzanie, Cameroon, Sooth Africae, Namibie, Zimbabwe, an Angolae. Native reintroduced introduced possibly extinct extinct Hatched: Possible historical range in Wast Africae. ![]()
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