The porcupine's thorns are barbed. When the porcupine is threatened, the thorn on its back will stand up immediately, and the thorn on its back can play two roles, namely, threatening the enemy and defending the enemy. In addition, a porcupine has 800 barbs on a thorn, which is difficult to remove after it enters the animal skin. Porcupine is the general name of 3 genera 1 1 species of porcupine family. There are 2 genera and 2 species in China.

The porcupine is famous for its 35cm-long spines, which can resist the enemy. Porcupines inhabit hillsides, grasslands or dense forests. They are cave animals. They often move at night and often have a certain route. When they walk, the thorns rub against each other. Porcupines breed 1 time every year, and are distributed in the Mediterranean coast of Africa and Europe, as well as tropical and subtropical forests and grasslands in southwest, south and southeast Asia.