They generally eat leafy material, although their ability to ferment food in their hindgut allows them to subsist on more fibrous plant matter when necessary.
They have a herbivorous diet, small brains 400–600 g (14–21 oz) for mammals of their size, one or two horns, and a thick 1.5–5 cm (0.59–1.97 in), protective skin formed from layers of collagen positioned in a lattice structure.
Rhinoceroses are some of the largest remaining megafauna: all weigh at least one tonne in adulthood. (It can also refer to a member of any of the extinct species of the superfamily Rhinocerotoidea.) Two of the extant species are native to Africa, and three to South and Southeast Asia. A rhinoceros ( / r aɪ ˈ n ɒ s ər ə s/ from Ancient Greek ῥῑνόκερως ( rhīnókerōs) 'nose-horned' from ῥῑνός ( rhīnós) 'nose', and κέρας ( kéras) 'horn' ), commonly abbreviated to rhino, is a member of any of the five extant species (or numerous extinct species) of odd-toed ungulates in the family Rhinocerotidae.
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