Characteristics of the Bearded Dragon (Pogona) include broad, triangular heads and flattened bodies with spiny scales (although not sharp) arranged in rows and clusters.
These scales are found on the throat, which can be expanded when threatened, and at the back of the head. These scales are used to scare off predators.
Bearded dragons display a hand-waving gesture to show submission, and a head-bobbing display to show dominance between dragons. They have the ability to change color during rivalry challenges between males, in response to ambient temperature changes such as turning black to absorb heat, and other stimuli. Males grow up to 60 cm (24 in) long, and females up to 51 cm (20 in). Bearded dragons also produce a mild venom originating from primitive venom glands. Although generally harmless towards humans, it is effective towards smaller-sized animals.