Researchers tagged ten humpback whales with section-cup sensors and tracked each mammal for a full day in Antarctic waters during the fall, the time and place when whales feed rather than breed. While the sensors picked up background song near all of the whales. Two individuals preformed long, complex songs more suited to mating behaviour. They even sang while on feeding lungs more than 100 meters below the surface. 

   

  The fact that these whales can vocalize even under widely different water pressures, may help us figure out how they produce their songs. And more important, the overlap in breeding and feeding activities proves humpback and other baleen whales are way more behaviorally flaxible than we thought. Unlike some human singers, they are definitely not one-hit wonders. 

                                                      

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