Encounter with an African Elephant in the Selous Game Reserve in Tanzania. The African Elephant is the largest living terrestrial animal, normally reaching 6 to 7.3 metres (19.7 to 24.0 ft) in length and 3.5 to 4 metres (11.5 to 13.1 ft) in height at the head, and weighing between 6,000 to 9,000 kg (13,000 to 20,000 lb). The largest on record, shot in Angola in 1965, was a bull weighing 12,274 kg (27,060 lb) and standing 4.2 metres (13.8 ft) high, the body of which is now mounted in the rotunda of the National Museum of Natural History in Washington, D.C. The Selous Game Reserve is one of the largest fauna reserves of the world, located in the south of Tanzania. It was named after Englishman Sir Frederick Selous, a famous big game hunter and early conservationist, who died at Beho Beho in this territory in 1917 while fighting against the Germans during World War I. Scottish explorer and cartographer Keith Johnston also died at Beho Beho in 1879 while leading a RSGS expedition to the Great Lakes of Africa with Joseph Thomson. The Selous was designated a UNESCO World Heritage Site in 1982 due to the diversity of its wildlife and undisturbed nature. Unlike other national parks in Africa safari by foot is permitted in the Selous Reserve. The United Republic of Tanzania is a unitary republic composed of 26 mikoa (regions). The name Tanzania is a portmanteau of Tanganyika and Zanzibar. The two states united in 1964 to form the United Republic of Tanganyika and Zanzibar, which later the same year was renamed the United Republic of Tanzania.