Along the shores of the Paracas National Park on the coast of Peru, two very different worlds collide - the barren Atacama desert and the seas teeming with wildlife such as sea lions, penguins and pelicans as well as guanay cormorants, a bird that once created fortunes for the local people through the sale of their droppings, an excellent natural fertiliser.
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Ready to Watch Natural World, Season 16, Episode 4?