A hedgehog is any of the spiny mammals of the subfamily Erinaceinae, which is in order Erinaceomorpha. There are seventeen species of hedgehog in five genera, found through parts of Europe, Asia, Africa and New Zealand.
Porcupines are rodents with a coat of sharp spines, or quills, that defend them from predators. They are indigenous to the Americas, Southern Asia, Europe, and Africa.