Rhinoceros 1 oz silver coin antiqued Congo 2012

Rhinoceros often abbreviated as Rhino, Two of these species are native to Africa and three to Soutern Asia
Members of the rhinoceros family are characterized by their large size (they are some of the largest remaining megafauna with all of the species able to reach one tone or more in weight); as well as by a herbivorous diet; a thick protective skin, 1.5–5 cm thick, formed from layers of collagen positioned in a lattice structure; relatively small brains for mammals this size (400–600 g); and a large horn. They generally eat leafy material, although their ability to ferment food in their hind gut allows them to subsist on more fibrous plant matter, if necessary. Unlike other perissodactyls the two African species of rhinoceros lack teeth at the front of their mouths, relying instead on their powerful premolar and moral teeth to grind up plant food.[1]
Rhinoceros are killed by humans for their horns, which are bought and sold on the black market, and which are used by some cultures for ornamental or traditional medicinal purposes. The horns are made of keratin, the same type of protein that makes up hair and fingernails.[2] Both African species have two horns, while the Indian have a single horn.