When the porcupine is tired, it grunts and raises it's black and white quills. There is one case of a tiger almost killed by a porcupine.
Porcupines travel alone or in small family groups.
Normally they sleep in the day and feed at night on fruit, roots, bulbs, little mammals, rodents and ill-mannered children. The mama porcupine is pregnant for about three months and has 1 to 4 baby porcupines. The adults mate very carefully. The babies have soft quills but by ten days, their quills are nasty hard and sharp. Normally, a porcupine's quills lay flat on its back.