The frill-necked lizard is an arboreal lizard, meaning it spends a majority of its time in the trees. The lizard ventures to the floor only in search of food, or to engage in territorial conflicts. The arboreal habitat may be a product of the lizard’s diet, which consists mainly of small arthropods and vertebrates (usually smaller lizards). However, the trees are most importantly used for camouflage. There is not one standard colour: rather, colouration varies according to the lizard’s environment. For example, a lizard found in a dryer, clay filled environment will most likely have a collage of oranges, reds, and browns; whereas a lizard found in a damper, more tropical region will tend to show darker browns and greys. This suggests they are adapted to their habitats; their colors are a form of camouflage.
The frilled-neck lizard is found mainly in the northern regions of Australia and southern New Guinea. The lizard is also, on rare occasions, found in the lower desert regions of Australia. The lizard inhabits humid climates such as those in the tropical savannah woodlands.