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How is an animal signal different from an accidental sound or movement?
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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.
In the study of animal communication, the primary distinction between a signal and an accidental sound or movement lies in its function.
- Signals: These are actions or anatomical structures whose primary purpose is to provide information to another animal. They are not inadvertent; they have evolved specifically to facilitate communication, such as a wren singing to interact with other birds.1
- Accidental sounds or movements: These are inadvertent byproducts of an animal's routine activities. For example, the noise a mouse makes while foraging is a necessary result of feeding, not a signal. While an owl may use that noise to locate the mouse, the sound itself does not qualify as a signal because its primary function is not to provide information to the predator.1
In essence, while other animals may extract information from an accidental cue, a true signal is a specialized adaptation designed to influence the decision making of a receiver.12