Alternatively, you can also remove uninvited visitors, especially moth caterpillars (they feed on wax).
There is also a ventilation in the ceiling, covered with a triple net, and a feeder pipette ending inside the hive with a feeding tray for flower pollen or sweet juice. I mainly use raw cotton for the nest lining and supplement it with a piece of moss and sheep wool for natural smells. The bedding must be fluffed up/cleaned before nesting.
The bumblebee sits on larch shavings. In places where there is a risk of ant infestation, I recommend lifting the bumblebee above the ground with metal feet (screws/screws) placed in oil-filled trays (included).
INFO: Total external dimensions without roof: approx. 31 x 35 with roof is 44 cm high.
For better durability I burn the bumblebee with a torch and then paint it twice with beeswax mixed with fermage.
The easiest way to house the hive is to trap a queen bumblebee in a butterfly net - the net is included.
You can increase the durability of the hive by painting the bumblebee house with sunflower/flax oil after the winter. The bumblebee house will last for many years.