The Eastern Blue-tongued Lizard (Tiliqua scincoides scincoides) is a subspecies of large skink which is common throughout Eastern Australia, often found in bushland and suburban areas where conditions are suitable. They are known as blue-tongues because their tongue ranges from bright to dark blue, and they have a habit of displaying it prominently and hissing loudly when disturbed. This subspecies was first described as Lacerta scincoides, by John White, in Journal of a Voyage to New South Wales, 1790.