A bee hive will split up into 2 or 3 new swarms each year. This is how they propagated the species. About one third of the swarm will leave the mother hive and settle in a cluster a few meters away. They sit like this while the scouts go out and find a more permanent, sheltered place to build their nest. It is at this time that that it is best to catch them so that they can be taken to a place where they won’t be a nuisance.