Five species of bumblebee, which twenty years ago were classed as widespread and common are now endangered. The red-tailed bumblebee remains widespread.
Bumblebees like to build nests in redundant mice and shrew holes. These may be found at the base of a hedge or in an area of rough grass. To make an artificial underground nest site, dig a hole, place a ball of moss or dry grass in the bottom and then cover it with a slab or an upside down terracotta plant pot, leaving a small entrance hole.