If you see a honey bee swarm, should you call a beekeeper or leave them alone and let them move on? Honey bees leave their hive when the colony gets too large or there is an issue. Once they do, they become a honey bee swarm. Bee swarms form a tight ball to protect their queen while scout bees search for a new home. Clustering helps them stay together, regulate temperature, and stay safe until they are ready to move on. It is very important to call a beekeeper when you see a honey bee swarm. Alt