My friend Ranse and I happened to be near his bee hives, when suddenly there began to be a big cloud of honey bees flying around the hive. Then this cloud of honey bees began to move toward the orchard. We followed them out there where they hovered around one of the plum trees. Then this large cloud of bees began to coalesce into a tight little “swarm” hanging from a tree branch. Eventually, Ranse suited up and captured them, putting them into a new box.
I don’t know how it works exactly, but apparently when the hive gets too large a new queen is produced, and the old queen leaves taking a bunch of bees with her and starts a new hive.
And then they live happily ever after.

Ranse collecting his honey bees