The Rhinoceros Beetle is named as such due to its horns, which replicate rhino horns. The rhino is valued for its horn. The horns of a rhinoceros are made of keratin, the similar type of protein that makes up hair and fingernails. Both African species and the Sumatran Rhinoceros have two horns, while the Indian and Javan Rhinoceros have a solitary horn. Rhinoceroses have acute hearing and sense of smell, but poor eyesight. The five living classes fall into three categories. The two African species, the White Rhinoceros and the Black Rhinoceros, diverged during the early Pliocene (about 5 million years ago) but the Dicerotini collection to which they belong originated in the middle Miocene, about 14.2 million years ago. The main dissimilarity between black and white rhinos is the shape of their mouths.
White rhinos have broad flat lips for grazing and black rhinos have long pointed lips for eating foliage. White Rhinoceros are alienated into Northern and Southern subspecies. There are two living Rhinocerotini species, the endangered Indian Rhinoceros and the seriously endangered Javan Rhinoceros, which diverged from one another about 10 million years ago. The critically endangered Sumatran Rhinoceros is the only surviving representative of the most primal group, the Dicerorhinini, which emerged in the Miocene (about 20 million years ago). The extinct Woolly Rhinoceros of northern Europe and Asia was also an associate of this tribe.
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Rhinoceros often colloquially reduced rhino, is a name used to group five extant species of odd toed ungulates in the family Rhinocerotidae. Two of these species are native to Africa and three to southern Asia. Three of the five species the Javan, Sumatran and Black Rhinoceros are vitally scarce. The Indian is scarce, with fewer than 2,700 entity residual in the wild. The White is registered as weak, with approximately 17,500 residual in the wild, as reported by the International Rhino Foundation.
Rhinoceros often colloquially reduced rhino, is a name used to group five extant species of odd toed ungulates in the family Rhinocerotidae. Two of these species are native to Africa and three to southern Asia. Three of the five species the Javan, Sumatran and Black Rhinoceros are vitally scarce. The Indian is scarce, with fewer than 2,700 entity residual in the wild. The White is registered as weak, with approximately 17,500 residual in the wild, as reported by the International Rhino Foundation.
