The gurgles, whistles, and squeaks of humpback whales singing off Hawaii’s island shores can now be heard live, courtesy of underwater microphones placed near Puako, Hawaii by the Jupiter Research Foundation. – Wired Science

It is thought that male humpbacks will sing for hours to attract their mates. Their day-long songs consist of “repeating low-frequency notes and melodies” that are audible many kilometers away. The females don’t sing but do communicate vocally.