The life span of an ant depends on the type of ant. Queen ants can have a life span of decades if the conditions are right. Workers typically live for a few months, and males survive only for some weeks.
The life of an ant starts as an egg, which hatches into a larva without any legs or eyes. Larvae rely on adults for food, and they eat a lot. They grow quickly, and when they have grown sufficiently, they transform into pupae. Depending on the species, pupae either spin a cocoon around themselves or remain naked and uncovered. At last, pupae emerge as adults.