Bearded dragons are known for being very territorial over the desert habitat they call home, and have many different behaviors related to expressing dominance or submission to other dragons that may invade their territory. They may bob their heads up and down to show dominance, or wave their hands about to show submission. They may open their mouth and puff up their “beard” in a threat display, sometimes turning the beard a deep black color in the process. If displays do not work, they may fight each other, using their mouths to bite.
These lizards eat mostly plants and occasionally insects and other smaller mammals and reptiles. They hunt during the day time, but may retreat to burrows if it gets too hot. They undergo a hibernation-like process called brumation, during which they may go months without eating and only occasionally drinking. This occurs during times of colder temperatures, when the cold-blooded lizards must lower their activity levels to conserve energy.