Now this was a nice find! And the second sighting within two days (both times on this Leucopogon bush, so perhaps it was the same wasp each time). 'Blue Ants' ... Diamma bicolor ... are a type of flower wasp. The common name refers to the large, flightless females which are a brilliant blue ... and indeed quite commonly sighted. The males, however, are much smaller, winged ... and very rarely seen! This is only the second time I've photographed one, the previous being in October 2022. And it's not just here that they're a rare sighting. There are over 600 iNaturalist records of this species between Sept 2022 and now ... and only 21 of these are males (including my 2)!

Diamma bicolor (link to iNaturalist record)