It’s been nearly a hundred years since the wolf went extinct in most of the United States. You’ve got no idea, none at all, of how dangerous they can be. A wolf can run faster than you can drive a car through most of Chicago. His jaws can snap your thighbones with one jerk. A wolf can see the heat of your body in the complete dark, and can count the hairs on your head from a hundred yards off by starlight. He can hear your heart beating thirty or forty yards away.
– from Fool Moon book by Jim Butcher