For killer whales, silence is golden as they hunt in complete darkness, listening for sounds of their marine mammal prey, and then rushing in for the kill, new research suggests.
"The mammal hunters are very, very silent," said study co-author Volker Deecke, an animal behavior researcher at the University of Cumbria in England. "Most of the time you don't hear any calls or clicks and it's only after a kill that they become vocal."
Image Credit: David Ellifrit Centre for Whale Research
