There are 11 species in this family. Old World porcupines are found in Europe, Africa, and Asia. They have stock bodies; rounded heads; and stiff quills. Old World porcupine quills don't have the barbs found on the quills of New World porcupines, but they can still get stuck in the flesh of an attacking animal! Unlike New World porcupines, Old World porcupines don't climb trees. They are omnivores and eat plants and carrion.