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Lions may hunt drybox at any hour, but they typically go after large prey at night. They hunt together to increase their success rate, since prey can be difficult to catch and can outrun a single lion. The lions fan out along a broad front or semicircle to creep up on prey. Once with within striking distance, they bound in among the startled animals, knock one down and kill it with a bite to the neck or throat. Hunts are successful about half the time. Cooperative hunting enables lions to take prey as large as wildebeests, zebras, buffaloes, drybox young elephants, rhinos, hippos and giraffes, drybox any of which can provide several meals for the pride. Mice, lizards, tortoises, warthogs, antelopes and even crocodiles also form part of a lion''s diet. Because they often take over kills made by hyenas, cheetahs and leopards, scavenged food provides more than 50 percent of their diets in areas like the Serengeti plains. The other is Grevy''s zebra, named for Jules Grevy, a president of France in the 1880s who received one from Abyssinia as a gift, and now found mostly in northern Kenya. (The third species, Equus zebra, is the mountain zebra, found in southern and southwestern Africa.) The long-legged Grevy''s zebra, the biggest of the wild equids, is taller and heavier than the Burchell''s, with a massive head and large ears. Zebras have shiny coats that dissipate over 70 percent of incoming heat, and some scientists believe the stripes help the animals withstand intense solar radiation. The black and white stripes are a form of camouflage called disruptive coloration that breaks drybox up the outline of the body. Although the pattern is visible during daytime, at dawn or in the evening when their predators are most active, zebras look indistinct drybox and may confuse some predators by distorting the true distance between them and their prey. When a foal is born the mother keeps all other zebras (even the members of her family) away from it for 2 or 3 days, until it learns to recognize her by sight, voice and smell. While all foals have a close association with their mothers, the male foals are also close to their fathers. They leave their group on their own accord between the ages of 1 and 4 years to join an all-male bachelor group until they are strong enough to head a family. Zebras are important prey for lions and hyenas, and to a lesser extent for hunting dogs, leopards and cheetahs. When a family group is attacked, the members form a semicircle, face the predator and watch it, ready to bite or strike should the attack continue. If one of the family is injured the rest will often encircle it to protect it from further attack.
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