The unique natural artwork represented by the scribbles on the surface of some species of Eucalyptus trees is the result of the scribbly gum moth larvae boring or eating a meandering tunnel through the bark of the eucalyptus tree.
Thicker lines are produced when the maturing larvae has turned around and eats up the highly nutritious cells generated by the tree.
The growing caterpillar leaves the tree to form a cocoon near the base of the tree. Not long afterwards, the bark cracks off to expose the artistic scibbles. Over time the colour of the freshly exposed trunk fades. Often after rain more intense colours are displayed.
Most images are from the bush in and near Sydney, Australia
To purchase, please see https://peter-kneen.pixels.com/collections/scribbly+gums