File:Calomyrmex, Roebourne, Western Australia. Farhan Bokhari.jpg

Calomyrmex, Roebourne, Western Australia. Farhan Bokhari

Worker in a defensive posture. When threatened, they run around frantically with their gasters raised and often exude a horrible smelling fluid from a gland near their mandibles that deters predators and probably serves to alert (recruit) nestmates.