Hedgehogs can live for 4 to 7 years. The life span of hedgehogs is generally 4-7 years, and the longest is about 10 year. As a pet hedgehog, its life span may be shorter, while 90% of small hedgehogs live less than one year.

Hedgehogs have short spines, and even their short tails are buried in them. When it was attacked by the enemy, its head bent to the abdomen, its body curled up into a ball, covered its head and limbs, and stood up like a steel thorn, just like an "iron thistle" on the ancient battlefield, which made the attacker unable to start. Hedgehogs dig holes to build nests, hide in their nests during the day and come out after dusk.

Appearance: Hedgehog is a small mammal, with a body length of only 25 cm and an adult hedgehog weighing up to 2.5 kg. The back and side of the body are covered with thorns, and the head, tail and abdomen are hairy; Long and sharp mouth, small ears, short limbs and short tail; There are five toes in the front and rear feet, and the bottom line of the foot, and a few kinds of forefoot have four toes; When curled up in a ball, the head and four feet are invisible. 36~44 teeth, all sharp, suitable for eating insects.

There are thorns all over the body except the stomach, and the short tail is also buried in the thorns. When frightened, its head bends to the ventral surface, its body curls up into a ball, wraps its head and limbs, and stands up with thorns to protect itself.