Army Ant Swarm

Army ants are a scourge of the tropics – mobile groups of aggressive ants who forage in great numbers, cleaning out whatever they can obtain in one area as they move to the next. They make temporary nests, or bivouacs , in hollow trees or burrows, and out of their interlocked bodies. Their huge colonies form in groups of 1d30+20 swarms, greatly increasing the danger to anything trapped in their path.