All colour variations known to occur in Tiger Snakes can be found in one litter. Kangaroo Island Tiger Snakes are distinguished from the island Pigmy Copper Head by the number of scales across the body, by the pattern of head scales and makings on the lower jaw. The Tiger Snake has between 17 to 19 mid body scales. The island Pigmy Copper Head has 15 mid body scales and bar markings on the lower jaw. They have scales and eyelids that move.
Lizards are reptiles with scales and eyelids that move.
Snakes do not have eyelids. At various times other mainland lizards have been introduced by people. Few of these introduced lizards have survived in the wild.