Do ants sleep?

A question I often ponder, given my excellent view from the toilet of a swarm that refuses to eat the ant poison.

Thanks to the miracle that is the Google, I now know the answer.

UPDATE:

The world's biggest ant colony was discovered in 2002. This supercolony has billions of ants living in millions of nests. It stretches 3,600 miles, all the way from Italy to northwest Spain.

!!!