A drone pilot captures footage of a humpback whale following a kayaker near Bondi beach. Up to 50,000 whales are expected to pass Australia’s east coast during the annual migration from Antarctica to the Great Barrier Reef. Humpback whales were removed from Australia's threatened species list last year after a significant increase in numbers, from just 1,500 at the height of the commercial whaling industry to an estimated 40,000
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