This species occurs in every state/territory of Australia, including Tasmania. It is also recorded in Indonesia and Papua New Guinea.
In the abdomen this species looks very like our European O. cancellatum (Black-tailed Skimmer). However the pterostigmas of O. caledonicum are yellow [as opposed to black] and there is a noticeable bronze tint to the outboard section of the wings.
We found ours around the Beechworth area, Victoria, both beside the waterfalls of the Beechworth Historic Park (Spring Creek) and at Lake Sambell in Beechworth itself.