A swarm is the process by which honey bee colonies reproduce themselves.
With good weather and plenty of forage, usually in early spring, hive populations increase dramatically.
The bees become overcrowded, and they raise a new queen. The old queen leaves the hive,
accompanied by thousands of worker bees. This is known as a swarm. The swarm usually lands
nearby the hive, in a cluster on a tree limb or other object. Scout bees are sent off to search for a new home.
The majority of the bees remain with the swarm, and cluster around the queen to protect her and save energy.
Scouts return with information about potential new homes. After a decision is made, the entire swarm flies off to their new home.
Swarms may remain stationary for only a few hours or a day or two. Swarms are temporary, and if left alone, will eventually move on.
Swarms are rarely dangerous. The bees have gorged themselves on honey, and as such are bloated and have a reduced
ability to sting. They will use the energy from the honey to build comb in their new hive. The bees are generally
not defensive, as they have no brood or honey stores to protect.
A suitable new home can be a tree hollow or other cavity such as a chimney, attic or shed.
In a human-inhabited area, there may be few suitable new home locations for a swarm.
If bees get established in a building or structure, removing them is costly and messy and
sometimes fatal to the colony.
The best time for a beekeeper to retrieve the swarm is while it is resting.
Swarms are valuable to beekeepers because they can be used to start new hives. Bees in a
swarm are generally very healthy, as swarms are cast from prosperous survivor colonies.
Each year, many bee colonies do not survive due to reasons such as diseases and mites.
Bees in a swarm are survivors, and adapted to local conditions.
Beekeepers will often collect a swarm free of charge, especially if the swarm is easy to reach.
Local beekeeper clubs publish phone numbers of beekeepers willing to do swarm captures.
A beekeeper captures a swarm by transferring the swarm into a box. The swarm is coaxed, shaken, or
transferred by hand into the box. Once the queen and a majority of the bees are in the box, the other
bees will enter willingly. The beekeeper will usually wait until dusk, for any stray bees and returning
scouts to rejoin their queen. The beekeeper then closes up the box and takes them away.