Bee swarms can be kinda scary. If you yourself see one, don’t be alarmed. The bee swarm is harmless and it’s likely to NOT attack. The only time a bee swarm may attack is if being attacked or intimidated. Things that intimidate a bee swarm is loud noises and vibrations such as lawn mower, weed eater, etc.
Never try to kill or remove bees yourself. They typically relocated themselves, typically within 24-48 hours or they will starve. When seeing a swarm that usually means the original hive is near by.
Swarming is a natural way the hive reproduces it’s self. For Honey Bees to survive they have to have a specific population in their hive. There can be tens of thousands in a bee swarm. When needing a bee swarm relocated you should call your local bee removal specials.
The hive starts preparing for the swarm many days in advance. They stop feeding the original queen and start creating queen cups to create more queens. Once the swarm leaves the original hive they find a area to congregate, Usually a tree near by. Scout bees are then sent out to find the best location to build a hive. When scouts return they do a waddle dance to show their enthusiasm about the location they found. Based on how hyperactive they dance the other scouts go to the location to see for themselves. As the scout bees return they give there opinion of the location by how hard they shake. This continues until it’s clear which location the scouts prefer.
Once the location is chosen the queen and the entire bee swarm will move to the location. If the queen is lost at all during this transition the colony will parish as they won’t be able to