 Pollen is removed from flowers deliberately or incidentally by bumblebees . Incidental removal occurs when bumblebees come in contact with the anthers of a flower while collecting nectar . When it enters a flower , the bumblebee 's body hairs receive a dusting of pollen from the anthers . In queens and workers this is then groomed into the corbiculae ( pollen baskets ) on the hind legs where it can be seen as bulging masses that may contain as many as a million pollen grains . Male bumblebees do not have corbiculae and do not purposively collect pollen . Bumblebees are also capable of buzz pollination , in which they dislodge pollen from the anthers by creating a resonant vibration with their flight muscles . 
