Frilled Dragon

The frilled dragon is a small lizard found in the forest and woodlands of northern Australia. Like its name suggests, an expandable frill surrounds the dragon's head and neck, which it can open like an umbrella when frightened. If this isn't enough to scare off an enemy, the frilled dragon will rear up on its hind legs and run away-- but rather than fleeing with its tail tucked between its legs, the dragon can simply leave it behind to distract a predator.

by www.livescience.com