Bumble bee collecting pollen on sunflower

An interesting fact about the Bumble bee species is that they have different lengths of tongues that match the flowers they feed on. This helps to reduce the competition for food between species because they aren’t all feeding off of the same flowers! Bumble bees with long tongues can reach the nectar in long tubular flowers, while medium and shorter-tongued species collect nectar from smaller flowers.
Here you can clearly see the pollen that is being collected on the hind legs of the bee.