Montana's Glacier National Park, with its breathtaking scenic vistas and sheer cliffs, is the cloud-scraping home of the Rocky Mountain Goat. Here Marty Stouffer examines the whole life story of this unique snow-white animal. We watch breathlessly as we see how the growing young kids learn to challenge gravity in a vertical world of harsh seasons, rugged crags and sudden avalanches.

How the gyrfalcon, snowy owl, ptarmigan and snowshoe hare survive the Arctic.

In French, the Fox is called "Reynard", meaning "unconquerable through his cleverness". Is this charming canid as crafty as the fables portray? Does it deserve its reputation as henhouse bandit? We'll find out as we meet these cunning hunters: the Arctic Fox, the Swift and Kit Foxes of our Southwest, the wide-ranging Gray Fox and the well-renowned Red Fox.

Seeds that actually walk along the ground, mushrooms that glow in the dark, and vines that strangle their host to death... These are just some of the extreme tactics that plants have adapted to ensure survival. Time-lapse photography reveals the Plant Kingdom's most ingenious and dramatic reproductive techniques, proving Plants to be as wild and indispensable as any wildlife.

Mollusks are among the oldest living organisms, their fossils dating back 600 million years. And to this day, wherever there's water -- fresh or salty -- you'll find at least one of these fascinating Invertebrates. The second largest group in the Animal Kingdom, they come in a wide variety of sizes, shapes, and surroundings, from high-mountain Snail to deep-ocean Squid.

Sentry marmots whistle when danger threatens.

North America's most widespread Mammal is a tenacious, aquatic Rodent -- always swimming, digging, or eating in a rich wetland home. It flourishes despite the pressures of civilization and the ever-present trappers who desire its thick, glossy pelt. Watching a Muskrat bite a Moose on the nose and fight with neighbors, we see why it's been likened to a grouchy old man.

Yosemite, one of our most spectacular National Parks, is home to six species of Chipmunks. Each is found at a different altitude, from dry foothills to 13,000-foot peaks. The life stories of several of these frisky, appealing creatures, and their relationship to humans, are seen amid the grandeur of Bridal Veil Falls, Half Dome and the world's oldest and largest Giant Sequoias.

The bobcat preys upon large and small creatures.

Our most enduring trees are the Evergreens -- the oldest, tallest, and largest of all living things! Long ago, people thought they were magical and brought their luck indoors to begin the Christmas tree tradition. Haven for a myriad of Birds and Mammals, which seek shelter among their boughs, these are truly trees for all seasons, symbols of the American wilderness.