A bee produces a buzzing sound through the quick movement of its wings, and a bumblebee moves both the wings and the thorax to create a buzzing sound during pollination. Bees buzz while flying and while collecting and depositing pollen among flowers.
Many plants require cross pollination to reproduce more plants. Bees land on the insides of the flowers and rapidly buzz by flapping their wings. These vibrations work to shake loose the pollen and cover the bee. The bee then flies to a different flower to deposit the collected pollen using the same vibrations to shake off the pollen.