Researchers report that individual dolphins respond vocally when they hear a whistle that is associated with them, much like a human responding to his or her name. Previous research suggested that dolphin individuals have a certain identifying sound akin to a name. The current study played those sounds to the associated individuals, finding that the dolphins vocally responded to their own sounds but not those of others. Parrots have demonstrated similar behavior, and the researchers think studying the evolution of communication in animals will shed light on human communication too.

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