The Nile crocodiles that live in the Luangwa River in Zambia dominate the waters, sending fear into the hearts of those who enter their domain. Every drink carries the potential risk of death for the animals that rely on the river for water as the crocodiles patrol up and down the banks. Prehistoric, deadly and powerful. These are the Luangwa Valley's ancient rulers. Home to the largest number of Nile Crocodiles per kilometre worldwide, the Luangwa is a battleground. They are the perfect predator. Unchanged from the time of the dinosaurs. And yet, beneath their scaly armour, secrets remain. We uncover the mysteries of these formidable reptiles. Discover... The Secret Ways of Crocodiles.