Rat Island: Predators in Paradise and the World's Greatest Wildlife Rescue

Rat Island rises from the icy gray waters of the Bering Sea, a mass of volcanic rock covered with tundra, midway between Alaska and Siberia. Once a remote sanctuary for enormous flocks of seabirds, the island gained a new name when shipwrecked rats colonized, savaging the nesting birds by the thousands. Now, on this and hundreds of other remote islands around the world, a massive-and massively controversial-wildlife rescue mission is under way.

Islands, making up just 3 percent of Earth's la...