Robert Valentic / Lowland blotched blue-tongue (Tiliqua nigrolutea) on a coastal bluff in the Bay of Fires region of north-eastern Tasmania, Australia, spring.

Mitsuaki Iwago / Eastern Blue-tongue Skink (Tiliqua scincoides) showing tongue, Australia

Doug Gimesy / Portrait of a Eastern blue-tongue skink (Tiliqua scincoides) rescued from wildlife smuggling, Captive.

Doug Gimesy / Portrait of a Eastern blue-tongue skink (Tiliqua scincoides). Captive, rescued from wildlife smuggling.

Pete Oxford / Eastern Blue-tongue Skink (Tiliqua scincoides), Brisbane, Australia

Theo Allofs / Eastern Blue-tongue Skink (Tiliqua scincoides) flicking tongue, Australia

Michael & Patricia Fogden / Eastern Blue-tongue Skink (Tiliqua scincoides) threat display, Karunda, Queensland, Australia

Gerry Ellis / Eastern Blue-tongue Skink (Tiliqua scincoides) extending blue tongue, Australia

Etienne Littlefair / Northen blue-tongue (Tiliqua scincoides intermedia) in monsoon vine thicket habitat, Darwin, Northern Territory, Australia, February.