Blue Whale songs consist of an A call, a series of pulses, followed by a long, low moan called the B call. This A-B sequence is repeated over and over again, approximately once every 130 seconds.

A whale’s song is one of the most haunting and mysterious sounds on Earth, echoing through the ocean’s depths for miles. What ...

takes a look at the awe-inspiring animal that is the whale, and calls us to protect their environments before it is too late. A beautiful and unusual book.