This wasp was observed spending a long time standing motionless inside crevices in the bark of a Red Gum with it's antennae touching the bark. It is therefore a parasite of an insect living under the bark, probably a Beetle larva.
Classification
from Australian Faunal Directory
Order Hymenoptera - Wasps, Ants, Bees and Sawflies, 12202 named species in Australia
Family Braconidae - Parasitic Wasps, 740 named species in Australia
Genus ?
Species ?