Some 30 of the 160 pilot whales that were found stranded off the coast of Western Australia on Thursday have died and the death toll could climb, local authorities said, adding that 100 have made it back out to sea. “You can hear them talking and squeaking and breathing,” local whale researcher Chris Burton said at the scene of the stranded whales, which he said was distressing. The scenario was “terrible,” said marine expert Ian Wiese, who was on site. Like other experts, he was initially convinced that most of the pilot whales would not survive the day. They are often crushed by their own we…