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How do pheromones allow a female moth to communicate with potential mates?

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Female moths communicate with potential mates by producing and dispersing sex-attractant pheromones, which are chemical signals used to attract males from a distance.12

When a female is ready to mate, she engages in a behavior known as "calling," where she exposes glands located in her abdomen to release these volatile chemicals into the air. These pheromones are highly specific to each species, ensuring that they attract the correct mates rather than individuals of other species. This specificity is often achieved by using unique mixtures of compounds, such as molecules with 12 to 18 carbon atoms, or by varying the proportions of specific components, such as the position of double bonds between carbon atoms.12

Because these pheromones must travel through the air to reach a mate, they are evolved to be volatile enough for dispersal while remaining specific enough to serve as a reliable signal. Once the pheromone reaches a male, it acts as a releaser, triggering an immediate behavioral response that guides him toward the female.2