Robbin Thorp has hypothesized that their decline is Bumble bee sex part due to a disease acquired from a European bee while being reared in the same facility. Pollen is mixed with the nectar and honey to create a protein-rich larval food. Although temporary low energy Bumble bee sex do not affect the survivability of the larvae, it increases the colonies' susceptibility to predators and increases the time of development for the larvae. But let's get to the good part shall we? This behavior is displayed when a bumblebee grabs the pollen-producing structure of the flower in her jaws and vibrates her wing musculature, causing vibrations that dislodge pollen that would have otherwise remained trapped in the flower's anthers.