Hedgehogs are most common in Europe and Northern Asia, and widely distributed in northern China and the Yangtze River valley, suitable for insectivores; when frightened, the spines are erect, rolled up like spine balls, and the heads and feet are invisible. Hedgehogs are nocturnal, feeding mainly on insects and worms. They can eat up to 200 grams of worms a night. When they are killed, they can curl up their bodies into spheres, themselves outward and protect themselves. They are soft and blind at birth.
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