Bumble bees generally visit flowers exhibiting the bee pollination syndrome. Bumble bees will also tend to visit the same patches of flowers every day, as long as they continue to find nectar and pollen, a habit known as pollinator or flower constancy. Once they have collected nectar and pollen, bumble bees return to the nest and deposit the harvested nectar and pollen into brood cells, or into wax cells for storage. They sure love the goldenrod in my back yard in Rockaway, NJ USA. I captured this worker with my Nikon D3100 and the 85mm macro lens.