Up until recently a creature I had never heard of, but that everyone else seems to know.
This is what Wikipedia writes about the Tatzelwurm:
Reports indicate that the creature has a snake-like body between 2 and 6 feet in length, with two clawed front legs, but no hind legs. It is sometimes reported to have the face of a cat. Local folklore holds that the Tatzelwurm is able to defend itself by expelling poisonous fumes that are capable of killing a human.