Bumble bees are important pollinators of wild flowering plants and agricultural crops. They are able to fly in cooler temperatures and lower light levels than many other bees, making them excellent pollinators—especially at higher elevations and latitudes. They also perform a behavior called “buzz pollination,” in which the bee grabs the flower in her jaws and vibrates her wing muscles to dislodge pollen from the flower. Many plants, including a number of wildflowers and crops like tomatoes, peppers, and cranberries, benefit from buzz pollination.
Because they are essential pollinators, loss of bumble bees can have far ranging ecological consequences. Alarmingly, recent work by the Xerces Society in concert with IUCN Bumble Bee Specialist Group, indicates that some species have experienced rapid and dramatic declines more than others. In fact, more than one quarter (28%) of all North American bumble bees are facing some degree of extinction risk. While some species have received considerable conservation attention, other species such as the Suckley cuckoo bumble bee and the variable cuckoo bumble bee have been largely overlooked.