Robert Valentic / Heath Monitor (Varanus rosenbergi) male enacting a threat display, in mallee/heath habitat near Pinnaroo, South Australia.

Nigel Cattlin / Asian water monitor (Varanus salvator) basking on rock, on bank of River Kwai, Kanchanaburi, Thailand.

Fabio Pupin / Rock monitor, (Varanus albigularis), popping out of grass, Ruaha NP, Tanzania, January . Non-ex.

Yashpal Rathore / Bengal monitor (Varanus bengalensis) Tadoba National Park, India

Yashpal Rathore / Bengal monitor (Varanus bengalensis) basking on the tree, Jim Corbett National Park, India

Steven David Miller / Rosenberg's goanna (Varanus rosenbergi) on rock. Species in decline on mainland and less so on Kangaroo Island. Flinders Chase National Park, South Australia. February.

Duncan Murrell / Asian water monitor (Varanus salvator) near the LAHG Research Station in the Sabangau (peat-swamp) Forest, Central Kalimantan, Indonesia.

Robert Valentic / Heath monitor lizard (Varanus rosenbergi) in threat display responding to a perceived threat. Baudin Beach, Kangaroo Island, South Australia.

Robert Valentic / Heath monitor lizard (Varanus rosenbergi) male patrolling a coastal bluff, Baudin Beach on Kangaroo Island, South Australia.

Rod Williams / Blue-spotted tree monitor (Varanus macraei), Batanta Island, West Papua, captive

Rod Williams / Blue Tree Monitor (Varanus macraei) captive from Batanta Island, Indonesia. Blue form discovered in 2001

Rod Williams / Blue Tree Monitor (Varanus macraei) captive from Batanta Island, Indonesia. Blue form discovered in 2001