The hedgehog is a small mammal characterized by its spiky coat, which consists of sharp, hollow hairs known as quills. These quills serve as a defense mechanism, protecting the hedgehog from potential predators. Hedgehogs are nocturnal creatures and primarily feed on insects, worms, and other small invertebrates. They have a keen sense of hearing and smell, allowing them to navigate their surroundings effectively. Hedgehogs are known for their adorable appearance and gentle nature, making them popular pets in some parts of the world.