South Luangwa National Park in Eastern Zambia, the southernmost of three national parks in the valley of the Luangwa River, is a World-renowned wildlife haven. It supports large populations of Thornicroft's Giraffe, and herds of elephant and buffalo often several hundred strong, while the Luangwa River supports abundant crocodiles and hippopotamuses. It is one of the best-known national parks in Africa for walking safaris. Founded as a game reserve in 1938, it became a national park in 1972 and now covers 9,050 km².
Within these woodland savannahs are larger patches of grassland, so that grazers such as zebra and leaf browsers such as giraffe are found in profusion in the same areas. Patches of flooded grassland habitats (floodplains) are found close to the river, on which hippopotamus graze at night. Their dung released into the river fertilises its waters and sustains the fish population which in turn sustains the crocodiles. The Luangwa valley, continued to the west by the Lunsemfwa River valley, contains some varieties of animals such as Cookson's wildebeest and Crawshay's zebra which are endemic or near-endemic to the valley. It also represents something of a natural barrier to human migration and transport, no roads cross it and this has helped conserve its wildlife.