The crested porcupine is the largest and heaviest of African rodents. The head is roundish and rather domed, with a blunt muzzle and small eyes and ears. The legs are short and sturdy, and each foot has five toes, all equipped with powerful claws.The porcupine is, of course, easily recognized by its most notable feature—its quills. Quill length on different parts of the body varies, from 1 inch up to 12 inches on the back. Usually the quills lie flat against the body, but if danger threatens, the porcupine raises and spreads them. Scales on quill tips lodge in the skin like fishhooks and are difficult to pull out. New quills grow in to replace lost ones.The porcupine warns potential enemies of its defense system when alarmed. It will stamp its feet, click its teeth and growl or hiss while vibrating specialized quills that produce a characteristic rattle. If an enemy persists, the porcupine runs backward until it rams its attacker. The reverse charge is most effective because the hindquarters are the most heavily armed and the quills are directed to the rear.When porcupine populations close to cultivated areas surge, they can become serious agricultural pests. They are smoked out of their burrows and hunted with spears, nets or dogs, practices that have eliminated them from densely settled areas.
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