Tsavo East and West National Parks form one of the world's largest game sanctuaries. Mzima Springs, replenished each day with 220 million litres of crystal-clear water from the underground streams of the Chyulu Hills, forms a haven for wildlife. Elephant soak half-immersed in the waters, hippos tiptoe across the bottom and crocodiles bask on the banks. Gazelles, including the less common fringe-eared oryx, gerenuk and lesser kudu, along with zebra and giraffe wander the banks to the sound of chattering monkeys and birds. Tsavo is famously home to many lions and other carnivores include the serval cat, hyena, leopard, cheetah and caracal.