a bungarra...

..also known as a sand monitor, Gould's monitor and a racehorse goanna.

Beautifully painted on the tailgate of a ute in the 'morning walk' car park.
And yes.
This is to scale!! They reach an average length of 1.4m weighing up to 6kg and probably called racehorse goannas because they move like the wind when startled.
Rumour also has it, that if you stand still while they are on the move, they may mistake you for a safe refuge tree and run up you!
Eek.