Although no one can predict whether bees will leave on their own, a good rule of thumb is that the longer the bees stay, the less likely they are to leave. Once they have started building hive material, they are less likely to abandon their home. When bees are just resting, they usually take flight within 24 hours.

Swarms are temporary and the bees will move on if you patiently ignore them. Stay back and keep others away from the swarm, but feel free to admire and appreciate the bees from a safe distance. You may be able to give a honey bee swarm to a beekeeper who will gather the swarm and relocate it for you.

Instead of resorting to harmful pesticides or other destructive methods, consider using humane methods to deal with the infestation. For instance, you can use smoke to calm the bees and encourage them to leave the hive. Alternatively, you can use a bee vacuum to safely remove the bees without causing them harm.

The RSPB suggests getting a small container or spoon and offering two tablespoons of granulated white sugar to one tablespoon of water. If you have your Bee Revival Keyring, this is an easy step for your spontaneous encounter with a tired bee.