The Wild West, where coyotes face a snowbound Yellowstone, rattlesnakes emerge in the hundreds, woodpeckers compete to store food, bison battle on the Great Plains and cranes gather in vast numbers on their age-old migration.

 

The Frozen North, where wolves and polar bears vie for food, hares outsmart lynx and walrus sing on rocky shores. As summer arrives, grouse perform mating dances, caribou migrate vast distances and salmon race upstream to survive.