S. stellio is found in Greece, Southwest Asia, and Northeast Africa. Total length (including tail) of S. stellio is up to 35 centimetres (14 in).
Like many agamids, stellions can change color to express their moods. They bask on stone walls, rocks, and trees. They are usually found in rocky habitats, and are quite shy, being very ready to dive into cracks to hide from potential predators.