The Beyer bees are swarming! A bee colony reaches its peak population in early summer. As a result, many nurse bees no longer have sufficient brood to look after. The bees start to build up to around a dozen particularly large cells. During the following days, the queen lays an egg in each of these cells. As they develop, the larvae are fed a special gland food called royal jelly. They grow very rapidly and around 16 days after the egg was laid, they emerge as new queen bees.
Afterwards, thousands of bees leave the hive with their new queen in a huge cloud. They later cluster on a nearby surface close to the mother hive, where they rest and reorient themselves. Then several hundred scout bees are dispatched to look for a suitable new home in the surrounding area, if possible, in a hollow tree trunk. The Beyer bees are also now leaving the hive. Are these perhaps our bees on this office window? The fire service captured the swarm and sold it to a beekeeper.