“What does a dolphin say when it crosses oceanic paths with other dolphins? Hello, of course, followed by a formal introduction that’s relayed through a high-pitched “signature whistle.”
Marine biologists from the University of St. Andrews in Scotland have long been studying dolphin’s cacophonous communication style — including a series of clicks, pulses and whistles — while the animal is in captivity. But until recently, they questioned how the signature whistles were used in the wild.
Now, they have an answer. The researchers used underwater microphones to follow pods of bottlenose dolphins in St. Andrews Bay. After weeding out some of the other sounds the animals make, they were able to determine that dolphins utilize their “signature whistles” when meeting up with other pods of dolphins — much like a catchphrase. Think, “Hey, how’s it going?” but in whistle form.”