The relationship between them is Parasitism. When the ants are collecting food the flies attack them and lay there eggs in the crevices of the ants head. The ant dies because the larvae then eats the ant. But the fly benifits.
Worker leaf cutter ants collect leaves from trees in the rainforest, thus getting their name, and bring the leaves back to their colonies. However, the ants don't eat the leaves, the leaves are...
Most people think that Leaf-Cutter Ants eat, well, LEAVES, but, that is wrong. As their name suggests, they DO cut leaves, but when they get to the colony, they grind the leaves to a pulp and use it...