A group of porcupines is called a prickle or a family. Sometimes referred to as ?quill pigs,? porcupines are mammals that inhabit many parts of Africa, Asia, Europe, North America and South America.

Porcupines are nocturnal, herbivorous rodents. Porcupines cannot shoot their quills. When porcupines feels threatened, they may rattle their hollow quills, stamp their feet and chatter their teeth.

Biologists classify porcupines into two groups: Old World porcupines and New World porcupines. Old World porcupines live primarily on the ground. New World species are good climbers that live in trees. Old World porcupine species include the Indian crested porcupine, African brush-tailed porcupine and the North African crested porcupine. New World species include the Brazilian porcupine, Canadian porcupine and Mexican hairy dwarf porcupine.