When they are older and their skins are harder they are ready to leave the nest

Life Cycle of Ants
Ants go through four stages in their life cycle: egg, larva, pupa, and adult. When the eggs hatch, the tiny larvae stay in the nest and are cared for by older worker ants.

When Young Ants Leave the Nest

Exploration Phase
- When the young ants reach a certain age, they enter an exploration phase where they venture outside the nest.
- This phase is crucial for them to learn about their surroundings, find food sources, and establish new colonies.

Independence
- As the young ants mature, they gradually become more independent and start to forage for food on their own.
- This period of independence is a vital step in their development and eventual role within the ant colony.

Establishing New Colonies
- Some young ants may leave the nest to establish new colonies, taking on the responsibilities of queen ants or worker ants in these new locations.
- This process helps in the dispersal and expansion of ant populations.

Factors Influencing Departure
- The timing of young ants leaving the nest can be influenced by factors such as food availability, colony size, and environmental conditions.
- In some cases, young ants may leave the nest earlier if they sense danger or overcrowding.

Conclusion
Overall, the departure of very young ants from the nest is a natural part of their life cycle. It allows them to explore, learn, and contribute to the growth and survival of ant colonies.