Only the males sing, making a loud high-pitched sound something like a circular saw and lasting about 15 seconds. The song is produced by a pair of tymbals located on the sides of the first abdominal segment, under the folded wings. The rapid contraction of the muscles deforms the tymbals, which produce the sound as they flex. The sound is amplified by air sacs on the male’s abdomen that serve as resonance chambers.
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