Two arboreal ants, a large Podomyrma inermis tree ant and a small Crematogaster acrobat ant, engage in a territorial skirmish. Adelaide, South Australia

Podomyrma gratiosa fighting with Crematogaster. Naracoorte, South Australia

Brute force versus chemical weaponry: the heavily armored Podomyrma gratiosa dispatches small Crematogaster with her powerful mandibles, but the smaller ants use strong defensive chemicals in return, coating their adversary with a thick acrid foam exuded from their abdomens. Naracoorte, South Australia