Major worker (Pheidole sp.) talks to a minor worker of the same speicies. Polymorphic ants have various shapes and sizes in the same colony. Kyogle, NSW.
This ant (Pheidole sp.) has a big head that looks a bit like a bum. I don't think it's actually called a big bum head ant though. Kyogle, NSW.
Green Ant aka Green Headed Ant (Rhyditoponera metallica) feasting on a drop of honey. Durack, QLD.