Through the night, a ravenous predator stalks its unwary prey. With a swift bite to the skull, it slays the victim, then throws back its head and howls. But this beast that hunts like a Weasel and howls like a Wolf is neither -- it's the five-inch Grasshopper Mouse of our western deserts and plains. It feasts on Tarantulas, Scorpions, and even other Rodents -- yet displays close family ties.