When a swarm issues from a beehive, the bees gather around the swarming queen on a bush or tree and cluster together. They aren't just resting and they aren't settling in for the long haul. Instead the swarm is sending out scouts every minute to find a new home for the hive. As the scouts return to the swarm, they dance on the surface of the swarm and campaign for the place they think would be a good home.
Tom Seeley explains in Honeybee Democracy that the dancing scouts are trying to convince other bees to go scout out the place they have found. If the convinced bees visit the new home and like it, they return and campaign to get others to go. If the bee doesn't find the place appealing, she returns and doesn't name call or belittle the choice. She doesn't bully the bees who want to move to the new place. She just doesn't campaign for it or try to get any of her sisters to go and visit.
In the end, some new home place will have convinced enough bees in the swarm that it is a good place to resettle. The swarm rises from the tree or bush and flies to the new place and moves in.
But if a beekeeper comes along and captures the swarm, we interfere with honey bee democracy. We have autocratically decided that our hive box is where this hive should live.
Sometimes the bees don't agree.
I have an apiary site in the community garden at Morningside in Atlanta. Like many community gardens, this one is on Georgia Power land and huge power lines run over the hillside apiary site. Georgia Power "maintains" the land because it belongs to them. I put maintains in quotation marks because they do not go near the beehives and the grass grows very tall there.
I don't think the bees like the power lines. I have housed three swarms on that hillside over the years and not a one of them stayed.
Most recently I caught another swarm on April 4. I think it was from my own hive. I have a very large hive that has now swarmed three times. It had some beautiful queen cells in it - huge. One had opened and the others seemed to be left untouched. The first swarm I took to Morningside and they didn't stay.
I think the second queen was in a small swarm about fifty yards from my house. My neighbor who didn't know I would come to get it, promised it to someone else, but I feel pretty sure they were from my beehives. By the time the person she called returned to Atlanta, the bees had left for parts unknown.
As I was driving home from out of town on April 4, my neighbor called me to report that he had seen a huge swarm swirling around in his backyard (just over the fence from my hives) and that it had landed in a shrub across the street. I was about an hour from Atlanta and told him I would rescue them as soon as I returned if they were still there. They were and here is the capture in my new box from Hive Butler: