Thanks to Shorty for the initial sighting. This Bull-ant was pulling along a live caterpillar which was longer than the ant, and would hold on to whatever it could grab with its legs, but the ant was more powerful.
Hi Christine & Alison, I had to look up a couple of references to be sure about this one. As it is so bright red I also first thought that it was the Red Bull Ant, M. gulosa, but M. gulosa always has a half red/half black gaster. So then I looked up other species from the gulosa species group (species closely related to M. gulosa) and M. simillima seemed likely and this is a relatively common ant in the region. I still wasn't sure as I have never seen one this bright before, but the image gallery in the Atlas of Living Australia shows several ants which are similarly bright in colour. Many ants start life quite pale and go darker over time, so maybe this is a young ant. Cheers, Jon https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:f1347f79-3edf-4d39-ac21-1ea21f45a58a#gallery