Another pollinator is the bumblebee. Bumblebees, like honeybees, nest in colonies. They often nest under the ground or in cracks between boards. This writer once had a colony of bumblebees to move into a birdhouse that was made from a small hollowed out log. There are a few beekeepers who work with bumblebees for crop pollination.
Bumblebees are useful pollinators inside greenhouses.
They are very expensive to buy. Some kinds of bees are solitary bees. These bees that live alone rather than in colonies as do honeybees and bumblebees. One such bee is the carpenter bee. This bee looks like a very large bumble bee and many people are easily frightened by them.