Movie 1

Mechanisms of Sound Production in the Bark Beetle D. valens
Video showing audio waveforms and high speed video of sound production in D. valens. Audio waveforms show two series of simple and interrupted chirps. High speed video, originally 240 frames per second, was slowed to 30 frames per second (1/8 its original speed) showing mechanisms associated with the production of simple and interrupted chirps. In the high speed videos, the white dots that appear intermittently correspond to the timing of sound production. During chirp production, the plectrum strikes teeth on the left file. The right elytron has been removed to show the mechanism.