We use bumblebees to achieve optimal pollination in a natural way. Compared to other pollinating insects such as honey bees, bumblebees are very effective pollinators. They are characterised by their high working speed (for example, visiting twice as many flowers per minute as honey bees). Their size allows bumblebees to carry relatively heavy loads, enabling them to make long foraging flights. Moreover, their relative size causes them to often make better contact with stamen and pistil than is the case with smaller insects.
Furthermore, bumblebees are relatively undemanding with regard to the conditions in which they are active. They are still active at relatively low temperatures (about 10 °C) and low light intensity.