what does an ant eat?

Excrements

The most important food is excrements from plant-lice. Plant-lice drink plant juices. When an ant strokes a louse with its antennae, the louse emits a drop of a fluid rich in sugar, which the ant swallows.

Food to larvae

Back in the anthill, the food is transferred to worker-ants that protect, nurse and feed the ants' larvae. The ants of a medium-sized hill eat about ten kilo of sugar in a summer.