Porcupines are one the world's largest rodents, weighing around 12 kg or around 30 pounds. Though they look like it should be part of the hedgehog family they are not related. This assumption is due to their coat of long spikes that it uses to protect itself from danger. There are almost 30 different species of porcupine found around the world. Their sharp, needle-like quills of the porcupine can be detached easily. An attacker of a porcupine is likely to end up with quills stuck in their skin, which are venomous and difficult to extract.