Doug Gimesy / Portrait of a Western Blue-tongue skink (Tiliqua occipitalis). Captive, rescued from wildlife smuggling.

Doug Gimesy / Portrait of a Western Blue-tongue skink (Tiliqua occipitalis). Captive, rescued from wildlife smuggling.

Doug Gimesy / Portrait of a Western Blue-tongue skink (Tiliqua occipitalis). Captive, rescued from wildlife smuggling.

Martin Willis / Stump-tailed Skink (Trachydosaurus rugosus) in threat display with extended tongue, Darling Range, Western Australia, Australia

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

Steven David Miller / Northern blue tongued skink, Kimberley, W. Australia, flashing tongue in warning

Steven David Miller / Northern blue tongued skink {Tiliqua scincoides intermedia} flashing tongue in warning display, Kimberley, Western Australia

Bert Willaert / Shingleback lizard (Tiliqua rugosa) sensing with tongue. Kalbarri National Park, Western Australia. October.