The Peruvian Sea Institute surveyed about 43 miles (70km) of beach coastline on Sunday and estimated that 592 birds were dead along the shore.

CNN: Peru investigates mystery pelican deaths

Each day we took a walk on a curving path that runs along the shore, looking out at the rugged coast, checking out the variety of birds perched on the craggy rocks below us.

FORBES: A Promise We Can Keep