This is one of what I think to be a 'major' of whatever ant species I am trying to pry from their nest! Haha, they have a nest in a couple of pieces of wood my father wants to burn, and I'm trying to get them to evacuate but no such luck. I pick at the wood everyday to try and force them out, but apparently there is a huge network of hide-outs no matter how destructive I am. I have come across huge amounts of brood, but still no queen sadly.
I am coastal NSW, 4 hours south of Sydney. This major measures about 1cm, the workers are only slightly smaller, without the large heads and have longer legs.