Hundreds of Pilot Whales Die After Beaching in New Zealand

Hundreds of pilot whales that swam into a shallow New Zealand bay died overnight. More than 500 rescuers tried to send the pilot whales back out to sea, but at least 250 died.  This is the worst think about dead of whales has ever happen in New Zealand.

New Zealand has one of the highest rates of whale standings, which are believed to occur when the mammals, who are known for their social bonding, make navigational mistakes while chasing prey, escaping predators or trying to protect sick members of the group.
https://www.nytimes.com/2017/02/10/world/australia/whales-beach-new-zealand.html