A hedgehog, also called a hedgepig or furze-pig, is a small mammal. It has between 5000-7000 spines on its back. There are hedgehogs in Europe, Asia, Africa, and New Zealand. When attacked or threatened, it curls up. Hedgehogs eat insects, snails, frogs and toads, snakes, bird eggs, carrion, mushrooms, berries and melons. Sometimes, hedgehogs will search for earthworms after rainstorms.