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.

Jouan & Rius / Blue Tongue Skink (Tiliqua scincoides) head portrait with mouth open revealing tongue, in defensive posture, Western Australia

Jouan & Rius / Blue Tongue Skink (Tiliqua scincoides) head portrait with mouth open revealing tongue, in defensive posture, Western Australia

Robert Valentic / Juvenile Northern Blue tongued skink {Tiliqua scincoides intermedia} Mt Isa, Queensland, Australia

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

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

Steven David Miller / Blue tongued skink {Tiliqua scincoides} resting in leaf litter, Garig Gunak Barlu National Park, Cobourg Peninsula, Northern Territory, Australia

Steven David Miller / Blue tongued skink {Tiliqua scincoides} resting on log, Garig Gunak Barlu National Park, Cobourg Peninsula, Northern Territory, Australia

Steven David Miller / Blue tongued skink {Tiliqua scincoides} with tongue extended in threat display, Garig Gunak Barlu National Park, Cobourg Peninsula, Northern Territory, Australia

Barry Bland / Blue tongued lizard / skink {Tiliqua scincoides}