10 Creatures That Are Terrifying Killers

Grass Snakes

Grass Snakes are thought to be completely harmless – at least to human beings – though they are deadly to smaller creatures. When it comes to frogs, mice, and lizards, this snake will consume them nearly whole, though they prefer to dismember their prey first.

Black-Footed Ferret

The Black-Footed Ferret may be rather adorable, and some people enjoy keeping them for pets, but they are actually quite dangerous. They sneak up to the hole of a prairie dog, then attack the throat when they pop up from the ground.