Bumblebee nest box with a "tunnel" entrance
Many of the materials for this nestbox are the same as the one above. As with the one above this nest box could be located above, partially in or almost entirely in the ground. For the sizes of flowerpot, see the nest above. For this nest a plastic flowerpot is best as a hole has to be cut into the side.
The small stones between the slate and the gauze are there only to provide a space for ventilation, so can be smaller than those in the top nest. The gauze is there to prevent entry of any predators, and may not be necessary if your flowerpot has very small drainage holes.
For nest material and chicken wire, see the nest above.
The hosepipe should fit snugly into the flowerpot hole. The length of pipe used does not matter, but it should be 20 cm or more for for a small flowerpot. The hosepipe can be used to fool a below ground nesting queen into thinking the nest is underground when it is not.
Where the hosepipe comes to the surface clear away foliage and clip the grass short to make the entrance visible to nest searching queens. If you have access to mouse/vole droppings a few scattered in this area can also help attract queens.
The large stones or slabs of concrete are there to provide drainage, and can be of any number.