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Lions are the laziest of the big cats. They usually spend 16 to 20 hours a day sleeping and resting, devoting the remaining hours to hunting, courting or protecting their territory. They keep in contact with one another by roaring loud enough to be heard up to five miles away. The pride usually remains intact until the males are challenged and successfully driven away or killed by other males, who then take over. Not all lions live in prides. At maturity, young males leave the units of their birth and spend several years as nomads before they become strong enough to take over a pride of their own. Some never stop wandering and continue to follow migrating herds; but the nomadic life is much more difficult, with little time for resting or reproducing. Within the pride, the territorial males are the fathers of all the cubs. When a lioness is in heat, a male will join her, staying with her constantly.

The cheetah is built for speed. It has long, slim, muscular legs, a small, rounded head set on a long neck, a flexible spine, a deep chest, nonretractable claws, special pads on its feet for traction and a long, tail for balance. Although fast, the cheetah cannot run at full speed for long distances (100 yards is about the limit) because it may overheat. Cheetahs have distinctive black "tear stripes" that connect from the inside corner of each eye to the mouth that may serve as an antiglare device for daytime hunting. Cheetahs are found in open and partially open savannas. Cheetah mothers spend a long time teaching their young how to hunt small live antelopes are brought back to the cubs and released so they can chase and catch them. Unlike most other cats, the cheetah usually hunts during daylight, preferring early morning or early evening, but is also active on moonlit nights.

Litters consist of two or three cubs that weigh about 3 pounds each. Some mothers carefully nurture the young; others may neglect or abandon them, especially when food is scarce. Usually two or more females in a pride give birth about the same time. A lioness will permit cubs other than her own to suckle, sometimes enabling a neglected infant to survive. Capable hunters by 2 years of age, lions become fully grown between 5 and 6 years and normally live about 13 years. Lions have long been killed in rituals of bravery, as hunting trophies and for their medicinal and magical powers. Although lions are now protected in many parts of Africa, they were once considered to be stock-raiding vermin and were killed on sight. In some areas, livestock predation remains a severe problem. Early written records described the giraffe as "magnificent in appearance, bizarre in form, unique in gait, colossal in height and inoffensive in character."