The brood of Pheidole are favored prey for many army ants. Pheidole are not without their defenses against army ant raids, however. Major workers with their powerful jaws are specialized for nest defense, and here a defending major (top right) attacks Neivamyrmex army ants (bottom left) as they attempt to make off with larvae. Smithville, Texas, USA

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