Karen Paolillo (with the skull of a hippo named Bob ... “Bob chased the crocodile away,” she says. Two years ago in February a hunting-camp guard told her that Bob was dead in the river.

Cobras are highly poisonous. But the fierce, agile, intelligent mongoose has a unique advantage—resistance to snake venom!

As crocodiles and hippos crowd one of the few remaining waterholes, chaos erupts and threatens the life of a baby hippo. - [Narrator] It's unheard of for crocodiles and hippos to mingle so closely.

I felt increasingly vulnerable,' says David, 'weighed down by a 500mm lens, conscious that lions or elephants could be approaching from behind to drink and aware that crocodiles were in the lake.' But ...