Chalcid wasp

15 mm is big for a Chalcid!

Check this sighting for a comparison http://www.bowerbird.org.au/observations/2422

nice shot, beautiful Chalcid

Chalcids are "jumpers" which tend to easily spook. Given their small size I think you did remarkably well with that photo.

Actually I do suspect that it is an Antrocephalus sp - just can't be sure without seeing the face and a couple of other characters. Antrocephalus species have a strong, more or less horseshoe shaped carina (keel) running around the face - you can get an impression that this carina is present when you look at your picture. I just don't like to make random suggestions based on characters I can't really see.

Thanks John. I thought it might be a wasp, but the thorax was really throwing me off.

At the moment ALA can't really take sightings that aren't identified as species. Give us time!

Very nice - this is a parasitic wasp - Superfamily Chalcidoidea, Family Chalcididae, subfamily Haltichellinae. The Chalcididae are generally recognisable by their enlarged hind femur (although this character occurs sporadically in a variety of other chalcids). Good shot - always happy to see more chalcids on Project Noah!