From “Back-yard Monsters in Color,” National Geographic, August, 1952.
Velvety black and yellow bumblebee fur has a deep pile. Carrying pollen grains caught on the hairs from male to female flowers, the bee helps propagate many farm crops. This bee is the only insect which pollinates some types of red clover. Others have tongues too short to reach the nectar, and so are not attracted to deep flowers where they would pick up pollen.
If you ever feel rejected by someone, you can tell yourself they just haven’t evolved to meet your needs. The right bees will find you, don’t worry.