It looks like humans aren’t the only animals with names. A study published recently shows that bottlenose dolphins also call each other by name.

The researchers extensively examined both wild and captive bottlenose dolphins and found that these mammals name themselves and communicate through “signature whistles.” The animals used the whistle to announce their identity and presence. The study also shows that the dolphins can copy the whistle name of companion dolphins and call out to them when separated. These sounds were recorded at distances up to 12 miles away depending on water depth and whistle frequency.

Source: King S, Sayigh L, Wells R, et al. Vocal copying of individually distinctive signature whistles in bottlenose dolphins. Proceedings of the Royal Society B. 2013 April 22; 280 (1757).

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