Gidgee Skink (Egernia stokesii)
Skinks generally have smooth scales. This species has evolved rough spiny scales
so that it can better defend itself against potential predators.
By moving into narrow crevices in the rocks, or tree splits and hollows, and
inflating its body with air, the spiny scales act like little hooks and prevent
the lizard from being pulled from its refuge.
Alice Springs Reptile