Frill-necked Lizard

(Chlamydosaurus Kingii)

The frilled lizard, also known commonly as the frill-necked lizard, frilled dragon or frilled agama, is a species of lizard in the family Agamidae. It is endemic to northern Australia and southern New Guinea. Its common names come from the large frill around its neck, which usually stays folded against the lizard's body.
When the lizard is frightened, it produces a startling deimatic display: it gapes its mouth, exposing a bright pink or yellow lining; it spreads out its frill, displaying bright orange and red scales; raises its body; and sometimes holds its tail above its body.

Source: https://en.wikipedia.org
/wiki/Chlamydosaurus

The frilled lizard is sometimes called the bicycle lizard. This is because it runs on its hind legs when it is scared.
Most frilled lizards are less than 12 inches long. An open frill stretches from 9 to 14 inches wide, making it at least as big as the rest of the lizard.
Frilled lizards stand on their back legs when they raise their frills to scare another animal.

Source: https://easyscienceforkids.com
/all-about-frilled-lizards/

The Frill-necked Lizard have a very distinctive running style. Watch the video below to see: