Kenya 200,000 zebras participate in the migration across the Mara River. The "Big Five" game animals of Africa, that is the lion, leopard, buffalo, rhinoceros, and elephant, can be found in Kenya and in the Masai Mara in particular. A significant population of other wild animals, reptiles and birds can be found in the national parks and game reserves in the country. The annual animal migration occurs between June and September with millions of animals taking part, attracting valuable foreign tourism. Two million wildebeest migrate a distance of from the Serengeti in neighbouring Tanzania to the Masai Mara in Kenya, in
Serengeti a diversity of grazers, including African buffalo, warthogs, Grant's gazelle, eland, waterbuck, and topi. The Serengeti can support this remarkable variety of grazers only because each species, even those that are closely related, has a different diet. For example, wildebeests prefer to consume shorter grasses, while zebras prefer taller ones. Similarly, dik-diks eat the lowest leaves of a tree, impalas eat the leaves that are higher up, and giraffes eat leaves that are even higher. The governments of Tanzania and Kenya maintain a number of protected areas, including national parks, conservation areas, and game reserves, that give legal protection to