Slow Lorises

This might just be the cutest, sweetest looking critter ever, but no matter how much you might want to grab one and cuddle it -don't. The slow loris though is actually one of the only poisonous mammals on earth. It produces the toxin in a gland in its armpit and the critters often rub their arms in the gland and rub the toxin on their young to protect them from predators. You might be thinking to yourself, 'yeah, but I have no intention of eating a slow loris, baby or not,' but the animal isn't just dangerous to animals stupid enough to take a bite. The primate can suck the poison into its mouth and then inject it into an enemy while biting. This poison can cause an allergic reaction in many animals (including humans) and result in death from shock.

It goes without saying that this is yet another reason you really shouldn't own one of these endangered animals as pets.