in Improvement in Food Production by

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  1. When a hive gets over-crowed, the old queen leaves the hive with some drones and workers and establishes a new hive at some other place.
  2. A worker of old hive now gets a royal jelly to become a fertile queen.
  3. After 7 days, the new queen also leads a swarm.
  4. It is followed by drones.
  5. One of them copulates with her in air and dies. The queen returns to hive.