Cicadas
Cicadas (Insecta: Hemiptera: Cicadidae) are true bug insects, best known for the songs sung by most, but not all, male cicadas. Males sing by flexing their tymbals, which are drum-like organs found in their abdomens. Small muscles rapidly pull the tymbals in and out of shape. The sound is intensified by the cicada's mostly hollow abdomen.
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