Bearded Dragons have a very interesting behavior often referred to as Arm Waving. The name is actually very descriptive of what it looks like.

The reasons that a bearded dragon will wave their arm is not entirely explained. However, it does seem to be a form of communication. A common belief is that arm waving is a passive message, to indicate submission when a larger or more dominant beardie is near by.

Arm waving is often accompanied with a slow head bob. For more information about head-bobbing, check out the Head Bobbing article.

And if the pictures to the right aren't enough, check out the Arm Waving Video!