Scientists believe they have finally discovered the cause of the mysterious Donald Duck-type sounds that have regularly been recorded in the deep ocean since the 1960s.
In a paper published in the journal Biology Letters, the researchers describe how they managed to identify the minke whale as the source of what have come to be known as “bio-duck” sounds after attaching sensors to the whales at Wilhelmina Bay, off the western Antarctic Peninsula.
The sensors included microphones that recorded both the sounds the animals heard as well as the sounds made by the whales, with the distinctive bio-duck sounds heard on the recordings along with other “bizarre” sounds produced by the marine mammal.
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