Blue whales — the planet’s largest animal — subsist on tiny crustaceans called krill. As populations of this food source ...

File photo of a blue whale off the coast of Bandon, Oregon. An analysis from the University of Washington finds that blue and ...

It would indicate major ecological shifts in the region if the whales stop singing. "If all those sounds disappear, it kind of alerts us that a change may be occurring in an area," ZoBell said.

The finding indicates whale songs could serve as a barometer for their overall health, the study said. ‘It is a window into their lives.’ ...

As populations of this food source recovered from the marine heat wave, detections of blue whale singing soared. When krill numbers fell again, so did the whales’ songs. Unlike blue whales ...

Whales sing more when they have a proximity ... “These vocalizations can be detected if the singing whale is anywhere within an area thousands of square kilometers around the hydrophone ...