Humpback Whales Migration to Australian Waters | Built to Survive | National Geographic WILD UK

These mega mammals migrate between the freezing waters of Antarctica, where the food is plentiful, to the warmer waters of the north, where they give birth. Clocking in at a whopping 10,000 kilometre round trip, it's one of the longest migrations of any animal on earth. Imagine swimming from one side of Australia to the other, and back again. These humpbacks are built to move. Their powerful tails provide slow, steady thrust, driving them forward through the water. And these giant pectoral fins, which are the largest of any whale, help the mighty humpback manoeuvre gracefully through the water. And being really big comes with other advantages too. Humpbacks store massive amounts of fat before their migration. This works a lot like a warm jacket as they glide through the coldest waters on earth. But it also serves as an extra energy source. Because whales are social mammals and they migrate great distances in their small pods or family groups, they're constantly communicating with one another. And it's this communication that I would love to hear. Sound travels roughly four times further underwater, and whales have taken advantage of this, evolving ways to communicate through a series of clicks, whistles and yowls. So, if I jump in the water, I should be able to hear them communicating. Their vocalisations underwater travel for kilometres.