Blue-tongued skink, usually called Tiliqua scincoides, is a common lizard distributed in Australia and New Guinea. Blue-tongued skinks have a brown or gray back and many black spots on the sides of their bodies, and they have a very obvious feature, which is that they look like two heads.
In fact, blue-tongued skinks don't really have two heads, their appearance just gives people this An illusion. This is because their heads are very wide, the scales on their noses are very small, and their eyes and ears are relatively small, making their heads look very flat. In addition, blue tongue skinks also have a very obvious feature, that is, their tongues are very blue, which is one of the reasons why they got their name.
The blue-tongued skink’s head shape has a certain protective effect. When they feel threatened or scared, they will tilt their heads upward and open their mouths to reveal their bright blue tongues. This behavior will make predators feel that they are very dangerous, thereby reducing the possibility of being preyed on.