ANIMALS WITH SPIKES

Spines and quills, found only in mammals, are the spikier features on an animal's body. These are specialised hairs that have grown larger, firmer, and straighter, transforming into a tougher and sharper structure.

Here are 5 animals with spikes for survival:

Porcupine quills stand upright when a predator is near and can embed themselves in the skin of larger animals, such as foxes and dogs. 

They have thick, slightly curved spines without barbs. As a defence strategy, they curl into balls, causing their spines to stick out, and making them look unappealing to predators.

Their spines are short, thick, and barbless, with blunt tips and stiffness, indicating they function as armour.

Their spines don't easily fall out. Like porcupines, they create sounds by rubbing their spines together, using this as a form of communication rather than for defence.

They have flat, round spines that are more flexible than the quills of porcupines. These spines are less effective in protecting against predators, unlike other mammals.