In the southern Pacific Ocean, off south-central Chile, is a wind-swept island with a mountain blanketed in old-growth forest. This mountain is inhabited by 70% of the world’s Pink-footed Shearwaters, a globally threatened seabird related to albatrosses. The island is called Isla Mocha (pronounced with a hard “ch”: Mo-cha), and is also home to around 600 Mochanos—residents who live in the plains below the mountain, harvesting shellfish and seaweed, grazing cattle and sheep, and fishing in the ferocious currents that roil around the island.