The hedgehog is a short and stout little mammal that is sometimes called a pincushion with legs! Most mammals have fur or hair that is somewhat flexible and soft. But the hair on the back of a hedgehog is a thick layer of spikes (or modified hairs) known as quills. These quills are made of keratin, the same stuff our hair and fingernails are made of. Find out more!
![](https://cdn.animalencyclopedia.info/wp-content/uploads/2022/09/1-kangaroos-300x200.jpg)