The frilled lizard, Chlamydosaurus kingii (family Agamidae), is unmistakable because of the large "frill" around its neck which the animal opens up when alarmed. Normally it hangs loose in folds.

Another characteristic of the frilled lizard is its habit of running on its two hind legs.

In colour it varies from grey to brown to almost black. It is common in the Cape York Peninsula interior, preferring dry schlerophyll woodland. It is arboreal but often hunts on the ground.