Southern right whales: Tracking unexpected Southern Ocean migrations
New Zealand's southern right whales were almost hunted to extinction a century ago.
Their recovery now depends on the health of the oceans - but where exactly do they feed?
The answer has surprised scientists and provided hope for the species amid climate change.
Video by Isabelle Rodd. Footage credited to the University of Auckland Right Whale Research Team was captured with a New Zealand Department of Conservation permit.