If left behind, the wax may melt, allowing the honey and wax to run. This may damage the finished side of the wall containing the nest. Nests above ceilings are an even greater problem in this regard. Remains of the nest may also attract other household pests such as dermestid beetles. They range in size from about 0.5 to 1.0 inch long.
Bumble bees are social and nest in existing cavities, usually on or in the ground.
They often use abandoned mouse nests, bird nests or anything containing cotton or other soft materials. Only fertilized queens survive the winter to start new colonies in the spring. Bumble bees seldom enter structures and do not behave very aggressively except in defense of their nest. They normally are a nuisance only if they have built a nest close to human activity. If control is necessary, it should be done by spraying or injecting a dust into the nest.