Volunteers managed to push around 40 whales out to sea using Monday evening’s high tide. But sometime overnight, the whales beached themselves again, and only 28 survivors have been refloated since.
New Zealand’s Department of Conservation said the pod of 49 long-finned pilot whales was found at Farewell Spit, about 90 kilometres north of South Island’s tourist town of Nelson.
It is not fully understood why whales, which travel together in pods, beach themselves but they are known to follow a leader as well as gather around an injured or distressed whale.
With rumbling ships, hammering oil drills and booming seismic survey blasts, humans have drastically altered the underwater soundscape, researchers' have repored.
The school of short-finned pilot whales washed ashore at Panadura, 25 kilometres (15 miles) south of Colombo, since Monday afternoon in the biggest-ever mass stranding of whales on the island.
An estimated 470 whales were discovered beached on the shore and sand bars along the remote island state of Tasmania. Veterinary teams are assessing a few more distressed whales for more mercy killings "based on animal welfare grounds."
Rescuers find 200 more pilot whales stranded on an Australian coast, raising the total to 470 in the largest mass stranding ever recorded in the country.
Though mass whale strandings occur relatively often in Tasmania, such a large group has not been seen in the area for more than a decade.
More than 300 pilot whales have been killed after being stranded on a beach as rescuers desperately try to keep more from coming onshore.
Rescuers tried to help more than a hundred mammals return to sea but many got stranded again. It is relatively common for whales to get stranded on the country's beaches.
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