Gryllacrididae  

Gryllacridids produce often loud sounds (the origin of the common name “raspy crickets” coined by Rentz (1996), specifically for Australian species) either during defensive displays or while drumming on the substrate in intra-specific communication. Sound is produced by rubbing spines on abdominal tergites against tubercles on the inner surface of the hind legs (Field and Bailey 1997). All species lack tympana so sound communication is via surface vibration. [1]

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