The Sunda rhinoceros, lesser one-horned rhinoceros, or more popularly Javan rhinoceros, Rhinoceros sondaicus, is a very rare member of the family Rhinocerotidae and one of five extant rhinoceroses. Once the most widespread of Asian rhinoceroses, this rhinoceros ranged from the islands of Java and Sumatra, throughout Southeast Asia, and into India and China. The species is critically endangered, with only one known population in the wild, and no individuals in captivity. The decline of this species is attributed to poaching, primarily for their horns, which are highly valued in traditional Chinese medicine. It can live around 30-45 years in the wild. It historically inhabited lowland rain forest, wet grasslands, and large floodplains. It is mostly solitary, except for courtship and offspring-rearing, though groups may occasionally congregate near wallows and salt licks. Aside from humans, adults have no predators in their range. The Javan Rhino usually avoids humans, but will attack when it feels threatened. Scientists and conservationists rarely study the animals directly due to their extreme rarity and the danger of interfering with such an endangered species. Taken from "Compl矇ments de Buffon" by Georges Louis Leclerc Buffon, published 1838.