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Flight of the Bumblebee

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If chubby bumblebees try to fly by just flapping their smallish wings or by keeping them stationary and using them to gain lift from air currents like airplanes, they would crash to the ground.  The wings are too small in proportion to their body.   Their anatomy seems so improbably built for flight that the buzz among some people is that "we simply don't know how bees do it." But we do.  Bees gain lift by vibrating their wings up and down about 200 times a second.   That vibration, making the characteristic buzzing sound, is accomplished by their thorax muscles. Musical notes are created on string instruments also by vibration. For a demonstration challenge, try vigorously moving your arms or legs (or both at the same time) for at least 200 times in less than a minute (this exercise is not intended for the faint hearted).

Bumblebees are found primarily in temperate regions of the northern hemisphere, often ranging farther north and higher in altitude than other bees. Fifty species of bumblebees are known in North America. Colonies of bumblebees, unlike those of honeybees, only survive during the warm season; new queens hibernate alone to begin another colony the following spring. Bumblebees are among the few insects that can control their body temperature. In cold weather, queens and workers can shiver their flight muscles to warm themselves, allowing them to fly and work at lower temperatures than most other insects. Their large size and heat-conserving hairy coats also help them stay warm. These features enable them to live in northern latitudes and alpine altitudes.

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