Palms which cannot withstand drought are found only in the wettest areas or along rivers. Vegetation reaches its peak in the rainy season when trees renew their leaves and flower. In true savanna lands, the grass is tall and coarse, growing about 6 to 12 feet high. Elephant grass may even reach 15 feet. The grass grows in compact tufts and has long roots that search for water. It looks green and healthy in the rainy season but turns yellow and dries in the dry season. The grass remains dormant during the long rainless period and grows again with the next rains. Among the tall grass are scattered short trees and bushes. As rainfall decreases towards deserts, the savanna changes into thorny scrub. In Australia, this scrubland includes plants like mallee, mulga and spinifex grass. The savanna, especially in Africa, is home to many wild animals. It is called the ‘big game country’ where thousands of animals are hunted every year. Some are killed for skins, horns, tusks or bones, while others are captured alive for zoos or research. Many wildlife films are actually shot in the savanna because of its rich animal life. There are two main groups of animals: herbivores and carnivores. Herbivores feed on grass and move quickly in search of food. These include zebra, antelope, giraffe, deer, gazelle, elephant and okapi. Many animals are well camouflaged and difficult to spot in the tall grass. Giraffes can see enemies from far away, while elephants are strong and protected by tusks and trunk. Carnivores like lion, tiger, leopard, hyena, panther and jackal have sharp teeth and strong jaws. Their body color helps them hide in the grass. They often stay hidden and attack their prey suddenly.