Swarming is undoubtedly one of the most spectacular and meaningful events in the world of beekeeping... It's the natural method of reproduction for bee families.
When a colony becomes too large and space in the hive becomes scarce, the old queen leaves her home with about half the colony and much of the honey the bees have stored up to that point. This is to have enough food and energy to create a new colony.
The attentive beekeeper knows how to recognize the signs: the construction of queen cells on the edges of the combs. This signals that a new queen is about to be born and that the current one must prepare for her great flight.
If you spot a "clump" (a ball of bees) hanging from a branch, don't be alarmed: