Sydney’s harbor becomes a humpback highway in winter as the whales migrate from feeding grounds in Antarctica to breeding areas off Australia’s coast.

Volunteers are working frantically on a second day to save dozens of pilot whales that have stranded themselves on a beach in Western Australia, but more than 50 have already died.

In this image made from aerial video shows numerous stranded whales along the coastline Wednesday, Sept. 23, 2020, near the remote west coast town of Strahan on the island state of Tasmania, Australia. More pilot whales were found stranded on an Australian coast Wednesday, raising the estimated total to almost 500 in the largest mass stranding ever recorded in the country. (Australian Broadcast Corporation via AP)HOBART – More pilot whales were found stranded on an Australian coast Wednesday, raising the estimated total to almost 500 in the largest mass stranding ever recorded in the country. Australia's largest mass stranding had been 320 pilot whales near the Western Australia state town of Dunsborough in 1996. In neighboring New Zealand, more than 600 pilot whales washed up on the South Island at Farewell Spit in 2017.