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How do crickets and katydids make sounds by rubbing their body parts together?

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Animals communicate by sending and receiving signals. For example, a mother dingo (Canis lupus dingo) can communicate certain types of information to her pups by using tactile signals conveyed through grooming. — Animal communication Animals communicate by sending and receiving signals. For example, a mother dingo (*Canis lupus dingo*) can communicate certain types of information to her pups by using tactile signals conveyed through grooming.

Crickets and katydids produce sound through a process known as stridulation, which involves rubbing their forewings together.12

In both groups, the mechanism functions as follows:
* The Anatomy: One forewing features a row of teeth, known as a file, while the opposite forewing possesses a hardened edge called a scraper.13
* The Action: The insects lift their forewings (tegmina) at an angle and rapidly open and close them. As the file moves across the scraper, the friction causes the wing membrane to vibrate, which generates their characteristic songs.3

While the basic mechanism is similar, the resulting sounds are species-specific and serve various purposes, including attracting mates, establishing territory, or signaling aggression. During this process, the wings are typically held at an angle of 15° to 40° relative to the abdomen, with sound produced specifically during the closure of the wings.123