Stellagama stellio, also known as the starred agama or the roughtail rock agama, is a species of agamid lizard, the only member of the monotypic genus Stellagama. The species can be found in Greece, western Asia and northern Egypt; it has also been introduced to Malta. It can reach a total length of 35 centimetres (14 in) or slightly longer. Like many agamids, the species can change its colour to express its mood. It basks on stone walls, rocks and trees. The species is usually found in rocky habitats and is quite shy, being very ready to dive into cracks to hide from potential predators.