Animals' treacherous journey: far more spectacular than 'chunyun'

Captain Dave Anderson on a hovering drone captured a five minute video featuring: a huge mega-pod of thousands of common dolphins stampeding off Dana Point, California. Three grey whales migrating together down the coast off San Clemente, California. And heart-warming close-ups of over a newborn Humpback whale calf snuggling and playing with its mum - as an escort whale stands guard nearby - off the coast of the Hawaiian Island of Maui. [Photo/IC]