Why do some animals have spikes, while others have armor? | The Week
Set of Hedgehog Animal with Spikes Stock Image - Image of lovely, porcupine: 169503299
LIVING BALL OF SPIKES! - YouTube
Featured Animal: Short-beaked Echidna - Animal Fact Guide
Which animal has the best defense: is it the turtle with its shell, the porcupine with its spikes, or the skunk with its pungent smell? - Quora
Animal City Lebanon - The porcupine has a coat of long spikes to protect itself from danger. He leads a solitary existence during most of the year. It is a nocturnal animal