Lickona missed this one as well, and Webb must be off smoking a cigar somewhere. So today the task falls to me:
A porcupine’s main defense against predators consists of keeping its backside to a predator. Get too close and you’ll snag 500 quills engineered to embed themselves deeper and deeper into flesh. A mouth full of these painful pins has caused many an animal to starve to death. In fact, the porcupine is so well-respected, it wanders the forest day or night without much hurry or fear. Few animals are clever enough to successfully hunt porcupines, though mountain lions, fishers, and Chevy Impalas have the most success. That mess of quills is equally effective against its own kind.
Whatever you do, do not follow the echidna link. And I don’t mean that in a ‘Ha! ha! Now that I’ve said something you won’t be able to resist following anyway!’ sort of way. This porcupine story contains enough sex and violence for the day.