Foraging bees return to the hive and dance to communicate the location of flowers to other foragers. The communication occurs when the dancing bees transmit vibrations to the honey comb with their thoracic muscles.
However, the movement of the thorax of bees and flies depends on the length of the wings. A thorax will vibrate faster with shorter wings than with wings that are normal length. The faster wing beat affects the pitch of the sound produced. Faster wing beats have a higher…
Source: Living With Insects Blog