Overview: The Blue Nile is the White Nile’s most important tributary. Its source springs from the Ethiopian highlands, one of the most beautiful landscapes on the planet. The rocks and canyons of the Simien mountains are a vulture’s paradise and home to some rare animal species. The Walia Ibex and the fantastic Gelada are unique to the land of the Blue Nile. There used to be a Yellow Nile, too, originating in the Chad. This tributary to the Nile dried out some 6000 years ago, but at its source, there is still water and even a tiny lake, sustaining a species of crocodile not found elsewhere in Africa. The last stage of the Nile leads through Egypt, past temples and tombs. Today, more than 80 million people live in the delta, among them two brothers who earn a living by hunting the Egyptian cobra. Finally, the Nile loses its way in a vast delta streaked by countless channels and ends in the Mediterranean Sea.