While walking around the garden with the camera, this came into view on the trunk of a White Brittle Gum, Eucalyptus mannifera ssp. mannifera.
And extracted from the hole that went in about 75 mm and then rose vertically.
Two months ago this post showed a pair of Endoxyla lituratus, (Cossidae). The larvae of this moth are said to be wattle tree borers, but it seems possible that the Brittle Gum may have been the origin of at least one of the moths.
Click to enlarge.