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Calls are typically brief sounds and are relatively simple in acoustic structure.
In longer calls there is no clear pattern or organization. Calls tend to be genetically determined. Songs are more complex and are made up of a group of notes separated from another group of notes. The song is used in attracting mates, defending territories, maintaining the pair bond, and synchronize the reproductive activities of mates. The basic notes of a song are inherited but a full song of the species can only be learned.