Bees Swarming is Natural, but why?

https://www.beekeepers.asn.au/swarms

Bees swarm primarily as a natural reproductive process for honey bee colonies, which occurs when the hive becomes overcrowded and resources become limited. This overcrowding can result from a rapidly growing population, especially during spring when nectar and pollen are abundant, leading to a shortage of space for brood rearing and honey storage. When the colony outgrows its home, the workers prepare to split by creating special queen cells and feeding developing larvae exclusively royal jelly to produce new queens. The existing queen, who is made lighter by reduced feeding, leaves the hive with about half the worker bees to form a new colony. This swarm is not typically aggressive because the bees are not defending a hive or its resources; they are focused on finding a new home.

Swarming is essential for the survival and expansion of bee populations, allowing the colony to reproduce and establish new hives. The swarm usually clusters temporarily on a nearby object, such as a tree branch or light pole, while scout bees search for a suitable new nest site.This temporary cluster typically lasts only a few hours to a few days before the bees fly to their new home. While spring is the peak swarming season, often between March and May, swarming can occasionally occur in summer or fall, particularly if the hive becomes too hot or humid, or if the colony is disturbed.