The first of six programmes

With sinister 'grin', powerful jaws and fearsome reputation, Nile crocodiles are, to most of us, creatures to be avoided.
But naturalist Tony Pooley has made a remarkable observation which shows that this living relative of the dinosaur can be a caring and sensitive creature, using its mouth to cradle its young as well as to crush its prey. What's more, they come when he calls!

BBC Bristol