The Americas

The Atlantic Coast, where wild horses battle, bald eagles chase ospreys and sharks protect fish. Raccoons navigate city life and black bears search for food in ancient forests.

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 more.

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.

The Andes, Earths longest mountain range. Baby bears make treacherous descents, rare hummingbirds compete for mates, frogs freeze and revive, and lizards battle for territory - all in a land of extremes, from glaciers to deserts.

The West Coast, where wolves scour shorelines, sea otters dive through surf, blue whales race and roll in a rare display and octopuses make the ultimate sacrifice for their young.