The Lar Gibbon (Hylobates lar), also known as the White-handed Gibbon, is a primate in the Hylobatidae or gibbon family. It is one of the more well-known gibbons and is often seen in zoos. The range of the Lar Gibbon historically extended from southwest China and eastern Myanmar to Thailand and Burma down the whole Malay Peninsula in primary and secondary tropical rain forests. It is also present in the northwest portion of the island of Sumatra. Lar Gibbons are diurnal and arboreal, inhabiting rain forests. They rarely come to the ground, instead using their long arms to brachiate through the trees. With their hooked hands they can move swiftly with great momentum, swinging from the branches.