Bumblebees (also spelled bumble bee, also known as humblebee) are flying insects of the genus Bombus in the family Apidae.
Bumblebees are social insects that are characterized by black and yellow body hairs, often in bands, a commonality among the majority of the species of Bombus. However, some species are known to have orange or even red on their bodies, or may be entirely black. Another obvious (but not unique) characteristic is the soft nature of the long, branched setae, called pile, that covers their entire body, making them appear and feel fuzzy. They are best distinguished from similarly large, fuzzy bees by the form of the female hind leg, which is modified to form a corbicula; a shiny concave surface that is bare, but surrounded by a fringe of hairs used to transport pollen (in similar bees, the hind leg is completely hairy, and pollen grains are wedged into the hairs for transport).