Good Ol' Gulo luscus

Wolverine (Gulo luscus)

This beast has earned the reputation of being the meanest animal of the woodlands. Fortunately for the rest of the wildlife, he is found only in the far north woods and thus can work out his savageness among such as wolves and coyotes.

He kills every creature he comes near whether he is hungry or not. He will sometimes bury meat in the snow, but such meat will be tainted by a secretion so that no other animal, including man, can eat it.

The wolverine is also a great camp robber, stealing everything from food to shining objects and clothing. Trappers hate him because he can rob the trap lines of the bait and even hide or destroy the traps...

Weighing from twenty to thirty pounds and ranging well over three feet long, this chunky mink-like animal is a fast traveller in the woods, feeding on all kinds of game. Two or more babies are born and quickly learn the ways of their parents.

Since the pelt has never brought much money, the wolverine has never been trapped or hunted to any degree. The species will survive because of this.

Source: Ovington, Ray (1965), The Compact Book of Small Game and Varmints

Footnote of Interest: In March of 1932, a particularly mean wolverine of savageness wrought unprecedented destruction upon Milbridge, a tiny coastal city in Maine, when it attacked and destroyed a shining object in the middle of the night: Milbridge's only lighthouse.