Blue-tongue skink

Description
Elongated, compact body, triangular shaped head and relatively short limbs. Their tails are shorter than their bodies. They are a grey or light brown colour with irregular dark spots along the body and their limbs are always black. 

Ethology
They are land-based and diurnal. Their main defence strategy is to show their blue tongue. When they feel threatened, they open their black mouths wide and flap their tongues. Although in reality they try to avoid physical confrontation.

Interesting Facts
Another function of the tongue is sensory; although not as sensitive as those of snakes, it is used to catch particles and analyse them, and is therefore frequently stuck out.