Ants will Win

Unlike (New World) army ants which are largely ineffective against larger animals, the powerful bites and huge numbers of driver ants (sometimes in excess of 22 million in a colony), as well as their habit of swarming into any opening in the body of their prey (including the mouth and nose), mean they can kill much larger prey animals than any other ant species. There have been reported cases of people - usually the young, infirm, or otherwise debilitated who could not escape - being killed and eventually consumed by them, often dying of asphyxiation. Their presence is also beneficial to certain human communities, such as the Maasai, as they perform a pest prevention service in farming communities, consuming the majority of other crop-pests, from insects to large rats.

Males leave the colony soon after hatching, but are drawn to the scent trail left by a column of siafu once it reaches sexual maturity. When a colony of driver ants encounters a male, they tear its wings off and carry it back to the nest to be mated with the queen.
-http://en.wikipedia.org/wiki/Siafu