Rhinoceros, Rhinoceros

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 critically endangered. The Indian is endangered, with fewer than 2,700 individuals remaining in the wild. The White is registered as Vulnerable, with over 9,000 remaining in the wild.

They generally eat leafy material, although their ability to ferment food in their hindgut allows them to subsist on more fibrous plant matter, if necessary. Unlike other perissodactyls, the African species of rhinoceros lack teeth at the front of their mouths, relying instead on their powerful premolar and molar teeth to grind up plant food.

The horns of a rhinoceros are made of keratin, the same type of protein that makes up hair and fingernails.

The plural in English is usually either rhinoceroses or rhinoceros . The usual plural in Greek, but rarely in English, is rhinocerotes ; rhinoceri is a pseudo-Latin form based on a false analogy with other Latin plurals.

Source: Wikipedia > Rhinoceros