We live in Central Qld Australia and can’t identify these wasps my mother found in this Casuarina tree. We have been looking on the net all morning trying to ID them. Sorry I couldn’t get any closer but they are right up the top of the tree. They are quite large being around inches long.
Your photo is not detailed enough to clearly identify your Paper Wasps, but we believe they are in the genus Polistes. Eric Eaton wrote in with this information: ” Check this out: http://www.geocities.com/brisbane_wasps/VESPIDAE.htm I’m thinking that the image submitted to your site is a nest of Polistes tepidus. Maybe? Great link for Australian insects in any event. Eric”