Seen within a nature reserve. Noticed one or two larger workers among the many normal sized ones. I think this ant prefers to come out on hot sunny days because I was at the same spot two days later, when it was cooler and overcast after a little bit of rain, and they were nowhere to be seen.

Mmmmmm ants, one of those things where I know a bit but not a lot. A quick browse of iNat sightings suggests Leptogenys. A quick look at ALA and AntWiki shows nothing too similar, except maybe Myopias but they are different enough to exclude. But here we reach an impasse, for all the species are very similar and there is no easy way to differentiate them without specimens. Oh well. Leptogenys it is!