The world's fastest land animal, the cheetah, can reach speeds of 70 mph. The most specialized member of the cat family, the cheetah also is the most endangered cat in Africa. Males are often social and may group together for life, usually with their brothers in the same litter; although if a cub is the only male in the litter then two or three lone males may form a group, or a lone male may join an existing group. These groups are called coalitions. In Serengeti, 41% of the adult males were solitary, 40% lived in pairs and 19% lived in trios. A coalition is six times more likely to obtain an animal territory than a lone male, although studies have shown that coalitions keep their territories just as long as lone males— between four to four and a half years.Males are territorial.The size of the territory also depends on the available resources; depending on the part of Africa, the size of a male's territory can vary greatly from 37 to 160 km2 (14 to 62 sq mi).
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