Their quills.
spikes
to protect themslfe
hedgehog
the giant australian hedgehog
It is their adaptation to protect them from predators and other sources of fear.
Hedgehogs have quills for protection against predators.
Predators of the hedgehog are birds of prey, wild dogs, and jackals. In the UK and most of Europe, the only natural predator of the Hedgehog is the Badger.
A variety of animals will eat the desert hedgehog including hawks and eagles. The hedgehog is also hunted by coyotes and foxes.
The word 'hedgehog' is a noun, a word for a type of mammal, a word for a living thing. A noun is used as the subject of a sentence or clause, and as the object of a verb or a preposition. Examples: A hedgehog is not a good pet because they are prickly. (subject of the sentence) Those are the footprints of a hedgehog. (object of the preposition 'of')
Hedgehogs have spines to protect themselves from predators and threats, when threatened they curl into a ball with their spines sticking out.
The can roll up into a ball of spikes and they actually run really fast