They're found only in New Guinea and Sumatra and at least one is at the San Diego Zoo.
A blue-tongued skink spends most of the day searching for food. When a predator threatens a skink, the lizard puffs up its body to look bigger. It opens its mouth and hisses while sticking out its bright blue tongue.
The sudden flash of color confuses the predator just long enough for the skink to get away.
Blue skinks are very common in Australia. They are often seen in peoples' yards, where they eat insect pests