Frilled-necked lizard (Chlamydosaurus kingii)

Also called a frill neck or frilled lizard, this animal is named for the large frill that encircles its head. When threatened, it stands on its hind legs, unfurls the frill, and opens its yellow mouth. If the intimidation tactic fails, the lizard simply runs away on its hind legs at top speeds.

Frilled lizards are members of the dragon family. They can grow to almost 3 feet, with their tail accounting for two-thirds of the length. They are brown or grey, but their frills usually have an orange or tan tinge.