Goanna smaller than the arm of an adult human. The smallest of these, the short-tailed monitor ("Varanus brevicuda") reaches only in length. They survive on smaller prey, such as insects and mice. Goannas combine predatory and scavenging behaviours. A goanna will prey on any animal it can catch and is small enough to eat whole. Goannas have been blamed for the death of sheep by farmers, though most likely erroneously, as goannas are also eaters of carrion and are attracted to rotting meat. Most goannas are dark-coloured, with greys, browns, blacks and greens featuring prominently; however, white is also common. Many
Sand goanna sand goanna does consume smaller species of monitors: Ackies, rock monitors and other dwarf species are often found and eaten. It is common to see a Gould's disturbing rock piles in an attempt to flush out any "Odatria". It lays its eggs in termite mounds to protect them from the harsh desert climate. Like all goannas and snakes the sand monitor has a forked tongue, with which it "tastes" the air. Scents are picked up on each side of the fork which, when retracted, brushes over an area in the mouth called the Jacobson's organ, which identifies on which side