They can even have as many as eight queens for every 1,000 workers. Their life span is only about one year. Fertilized eggs hatch into females, which are usually sterile workers. Physical and behavioral variety determine labor division. The soldiers of the colony are usually the largest ants with big, muscular heads and sword-like jaws.
Most ants are medium sized and forage for food.
Deborah Gordon of Stanford University conducted an experiment to see how ants find food. She put a layer of dried sugar water in an arena. Different Argentine ant colonies searched for the food, then came back empty-handed, having found none. William Creighton conducted an experiment to see how ants forage for food. He found they do it in files.