Individuals from the rhinoceros family are portrayed by their expansive size and additionally by a herbivorous eating regimen; a thick defensive skin, 1.5–5 cm thick, shaped from layers of collagen situated in a cross section structure; generally little brains for well evolved creatures this size and a huge horn. They for the most part eat verdant material, in spite of the fact that their capacity to age nourishment in their hindgut permits them to subsist on more sinewy plant matter, if important. Not at all like different perissodactyls, the two African types of rhinoceros need teeth at the front of their mouths, depending rather on their lips to cull sustenance.
Rhinoceros are slaughtered by people for their horns, which are purchased and sold on the bootleg market, and which are utilized by a few societies for fancy or customary therapeutic purposes. East Asia, particularly Vietnam, is the biggest business sector for rhino horns. By weight, rhino horns cost as much as gold on the bootleg market. Individuals crush the horns and after that devour them trusting the dust has remedial properties. The horns are made of keratin, the same kind 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.