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The longest known black rhinoceros horn measured nearly 1.5 m (4.9 ft) in length. [25] Sometimes a third, smaller horn may develop. [26] These horns are used for defense, intimidation, and digging up roots and breaking branches during feeding. The black rhino is smaller than the white rhino and close in size to the Javan rhino of Indonesia
The western black rhino emerged about seven to eight million years ago. It was a sub-species of the black rhino. For much of the 20th century, its population was the highest out of all of the rhino species, at almost 850,000 individuals. There was a 96% population decline in black rhinos, including the western black rhino, between 1970 and 1992.
The south-central black rhinoceros (Diceros bicornis minor), also known as the south-central hook-lipped rhinoceros or the lesser black rhino, is a subspecies of the black rhinoceros. In keeping with the rules of zoological nomenclature, the south-central black rhinoceros should be known as Diceros bicornis keitloa (Smith, 1836), a nomen novum. [3]
An endangered species is a species that ... Carbon dioxide in Earth's atmosphere is asserted to be one of the leading causes of animal endangerment. ... Black rhino ...
As the black rhinoceros population is extirpated in most of these areas, the status of the latter subspecies is unclear. Some animals of the Kenyan population may belong to it. These black rhinos were examined by Benson and others through the Kenya Wildlife Service and had an article published by the African Journal of Ecology (Benson, 1, 791).
The earliest remains assigned to the modern black rhinoceros are known the Late Miocene (around 7 million years ago) of East Africa, [6] though other authors have considered the earliest remains of the species to date to the earliest Pleistocene around 2.6 million years ago at Koobi Fora, Kenya.
A rhinoceros (/ r aɪ ˈ n ɒ s ər ə s / ry-NOSS-ə-rəss; from Ancient Greek ῥινόκερως (rhinókerōs) 'nose-horned'; from ῥίς (rhis) 'nose' and κέρας (kéras) 'horn'; [1] pl.: rhinoceros or rhinoceroses), commonly abbreviated to rhino, is a member of any of the five extant species (or numerous extinct species) of odd-toed ungulates (perissodactyls) in the family ...
The IUCN Red List of Threatened Species by the International Union for Conservation of Nature is the best known worldwide conservation status listing and ranking system. . Species are classified by the IUCN Red List into nine groups set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmenta