White On White

On the Arctic tundra, predator and prey alike are aided by fur or feathers the color of snow. Some, like the Gyrfalcon and Snowy Owl, stay white year round; others, like Ptarmigan and Snowshoe Hare, turn white for winter. Forcing its inhabitants to migrate, adapt, or perish, the world's harshest, yet most sensitive, environment is the setting for a continual life-and-death drama.