وحيد القرن السومطري
The Sumatran rhinoceros ("Dicerorhinus sumatrensis") is the smallest extant rhinoceros species, as well as the one with the most hair. It can be found at very high altitudes in Borneo and Sumatra. Due to habitat loss and poaching, their numbers have declined and it has become the second most threatened rhinoceros. About 275 Sumatran rhinos are believed to remain. There are three subspecies of Sumatran rhinoceros: the Sumatran rhinoceros proper ("Dicerorhinus sumatrensis sumatrensis"), the Bornean rhinoceros ("Dicerorhinus sumatrensis harrissoni") and the possibly extinct Northern Sumatran rhinoceros ("Dicerorhinus sumatrensis lasiotis").