Cheetahs do not roar like lions, but they purr, hiss, whine and growl. They also make a variety of contact calls; the most common is a birdlike chirping sound. Once a cheetah has made a kill, it eats quickly and keeps an eye out for scavengers lions; leopards, hyenas, vultures and jackals will occasionally take away their kills. Although cheetahs usually prey on the smaller antelopes such as Thomson''s gazelles and impalas, they can catch wildebeests and zebras if hunting together. They also hunt hares and other small mammals and birds. Although known as an animal of the open plains that relies on speed to catch its prey, research has shown that the cheetah depends on cover to stalk prey. The cheetah gets as close to the prey as possible, then in a burst of speed tries to outrun its quarry. Once the cheetah closes in, it knocks the prey to the ground with its paw.

Family members look out for one another; if one becomes separated from the rest, the others search for it. The group adjusts its traveling pace to accommodate the old and the weak. The females within a family observe a strict hierarchical system. A dominant mare always leads the group, while others follow her in single file, each with their foals directly behind them. The lowest- ranking mare is the last in line. Although the stallion is the dominant member of the family, he operates outside the system and has no special place in the line. Zebras are avid grazers. Both Burchell''s and Grevy''s zebras are in constant search of green pastures. In the dry season, they can live on coarse, dry grass only if they are within a short distance (usually no farther than 20 miles away) of water holes. Grevy''s zebras are now mainly restricted to parts of northern Kenya.

The stripes on Grevy''s zebras are more numerous and narrow than those of the plains zebra and do not extend to the belly. In all zebra species, the stripes on the forequarters form a triangular pattern; Grevy''s have a similar pattern on the hindquarters, while others have a slanted or horizontal pattern. Burchell''s zebras inhabit savannas, from treeless grasslands to open woodlands; they sometimes occur in tens of thousands in migratory herds on the Serengeti plains. Grevy''s zebras are now mainly restricted to parts of northern Kenya. Although they are adapted to semi-arid conditions and require less water than other zebra species, these zebras compete with domestic livestock for water and have suffered heavy poaching for their meat and skins. Family groups are stable members maintaining strong bonds over many years. Mutual grooming, where zebras stand together and nibble the hair on each other''s neck and back, helps develop and preserve these bonds.

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