Rescued a fly from the surface of the pool, one I have not seen before so worthy of a photo but only had my phone. However did manage a photo (not very good) but as soon as I came back with the camera, the fly had dried out and was not having another photo taken.
Tracked down the ID as a Black White-tipped Brown Bee Fly Comptosia apicalis one of the many species of this family. The white tips (the white near the body is light reflection not white marking) identify this one as a male as the females have brown wings.
They feed on pollen and nectar of flowers where as the larvae are parasites on other insect larvae.
Not much information on their range but sightings a shown down the east coast of Australia.