The Frilled Neck Lizard grows to around 45-90cm in length, about two-thirds of which is tail. It has a vivid yellow mouth and a large extendable frill gathered about the neck and under the throat. It frequently runs at speed on two legs to escape danger, quickly climbing the nearest tree to safety. Their colour can be brown or grey with the frill being lighter and often tinged with orange or reddish-brown. Males are bigger than females and have a more robust appearance.
Inhabits dry woodland, shrubland and grassland. Most of the time is spent off the ground in trees, often at a substantial height.
Eats mainly insects, spiders and other invertebrates, although small mammals and reptiles are also taken occasionally.
The female Frilled Neck Lizard lays between 8-14 eggs which are laid at the beginning of the wet season. Once hatched, the hatchlings are fully self-sufficient.