 But the bulldog @-@ ant of Australia affords us the most extraordinary example of this kind ; for if it is cut in two , a battle begins between the head and the tail . The head seizes the tail in its teeth , and the tail defends itself bravely by stinging the head : the battle may last for half an hour , until they die or are dragged away by other ants . This contest takes place every time the experiment is tried . " 
