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PHOTOGRAPH BY SCOTLAND: THE BIG PICTURE, NATURE PICTURE LIBRARY
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Interspecies communication: Kylie the wild dolphin, living off Scotland’s west coast, hasn’t been spotted with another dolphin for 14 years. But he has reduced his normal patter of whistles, clicks, and pulsing sounds to simple clicks when he “talks” to harbor porpoises (pictured above), who speak only with clicks. “Clearly, species in the wild interact much more than we thought,” dolphin behavior expert Denise Herzing tells Nat Geo.
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