Flora: In its rainforests are trees, such as the ketapang, which are over 60 m high supported on 6 m tall buttress roots. Vines called 'wait-a-minute' are tipped with spines and snare at people using jungle tracks. Strangler figs send long tendril roots to the ground from branches of tall trees; as the tree grows, it gradually suffocates its host tree. The Corpse Plant, a huge foul plant that smells like putrefying animal flesh, consists of a central spike over 2 m high which rises from a bowl of giant leaves. Its stench attracts beetles and other insects which help it pollinate. The ref/esia, the biggest flower in the world, grows up to 1 m in diameter. Found on the west coast, this fascinating plant rises from the fungus-like leaf-littered forest floor. A bud develops which grows and reaches the size of a large cabbage, brown in color. Nine months later the flower opens, spreading out brilliant white-spotted orange petals. Finally it rots to a spongy mess on the mossy, damp ground, its large sticky seeds are carried to new soil by animals that eat or brush against them.Fauna: Sumatra has always been famous for its animals. Besides tigers, rhinos, and wild oxen, there are orangutans, many species of apes, tapirs, wild dogs and pigs, sun bears, flying foxes, the rare goat antelope, the Sumatran Hare, Sumatran leopards, and civet cats. In its mangrove swamps are found the flying lemur (culogos) and the Proboscis monkey. Other unique animals of Sumatra are the Black Baboon (cynocephalus nigerl, the fox-nosed monkey (taraius), and the Slow Lori (nycticebus). There's a difference between fauna of the north and that of the south; the orangutans, rhino, wild pigs are only found in the north, while the tapir and certain species of monkeys are found only in the south. Birdlife includes dazzling parrots and cockatoos, hornbills, the Great Argus Pheasant and the Crested Partridge, the Rose Crested Bee-eater, woodpeckers, and pigeons. There are 900 elephants left, moving in herds of 20-30.