The queen is the one who lays all the eggs. All the workers are Sterile females. Some ants will form super colonies with many queens made from individual colonies.
Ants will live in every environment except the Antarctic. Even the driest of regions are inhabited by the ants. One species of ants has been shown to live in underwater colonies. They breathe in trapped pockets of air.
Ants have a variety of predators like amphibians, reptiles, insects, other ants, birds, bats, and spiders.