This tiny red bodied wasp is hunting. The leaves below are attached and contain the caterpillar of a moth. It stopped afrer some pacing around and placed an egg through the leaf with her ovipositor.
Suburban park eucalyptus sapling.
I have seen this wasp before (or similar) laying on hempteran gall insects. http://www.projectnoah.org/spottings/792... Other species have been observed up to the same tricks http://www.projectnoah.org/spottings/108...