Lake St. Lucia, Africa's largest estuary lake, is under siege. A series of human missteps have left it cut off from the sea, and the water levels are dangerously low. The wildlife relying on its ecosystem are most affected--from hippos and crocodiles that live on its banks, to exotic birds that migrate from as far as 6,000 miles away. Can they adjust to the new, drier reality imposed on them?
Andrew Scott narrates a special programme which celebrates winter and explores how animals and plants rise to the challenges it brings. With their world encased in snow and ice, animals must find the most inventive ways to survive and even benefit from the cold. Caribou become ice road travellers as it gets slippery underfoot, stoats make their own fur bedding, and snow monkeys find a warm bath. Emperor penguins are built for the cold weather, but even they must find their own tricks to endure the world's most savage winter.
Once a rich wilderness teeming with lions, tigers and cheetahs, the Gangetic plains of northern India have been transformed into the most densely populated place on Earth. The film explores the impact of this tide of humanity on the wildlife of the plains - from the all-out war between elephants and villagers to worship of the deadly cobra.
In the wild North Atlantic, massive whale pods, giant turtles and monstrous jellyfish ride the Gulf Stream, a huge ocean current that becomes a migration superhighway and helps warm northern Europe. Meanwhile, fishermen battle for survival in mountainous seas as they try to reap the current's natural fertility.