the sumatran rhinoceros ("dicerorhinus sumatrensis") is a member of the family rhinocerotidae and one of five extant rhinoceroses. it is the smallest rhinoceros, standing about 120–145 centimetres (3.9–4.8 ft) high at the shoulder, with a body length of 250 centimetres (98 in) and weight of 500–800 kilograms (1100–1760 lb).