The heaviest of them, the Indian rhino, can weigh up to 2,700kg and possesses an enormous horn. But despite their formidable-looking appearance, rhinoceroses are relatively unaggressive herbivores.
The white rhinoceros is the largest extant rhino species, with two subspecies: the southern white rhinoceros and the northern white rhinoceros - James Warwick/Getty ImagesMale rhinos fight each other over territory and to establish mating rights - Sallyrango/Getty ImagesAll but one of the surviving species of rhino are classified as endangered to some extent - Images say more about me than words./Getty ImagesRhinos are herbivores. Their horn (or horns) are used for defence, rather than attacking - fishcat007/Getty ImagesRhino horns are made from keratin – the same material as hair and fingernails - Udo Kieslich/Getty ImagesRhinos use their horns to ram each other – and black rhinos are considered to have the highest rate of mortal combat recorded among mammals - Andreas Kestel/Getty ImagesRhinos have poor eyesight but strong hearing and sense of smell - Bryan Tropeano/Getty ImagesAs a species, rhinos can run surprisingly fast – black rhinos can reach speeds of 45kph (30mph) - S_Lew/Getty ImagesThe word rhinoceros comes from Greek, with 'rhino' meaning 'nose' and 'ceros' meaning 'horn' - Steve watkins/Getty Images
Sophie is the content creator for discoverwildlife.com and its sister title countryfile.com. She manages the Q+A section of BBC Wildlife and covers the latest natural history TV and film releases.