The strangest features of some creatures are the very elements which have allowed them to survive. Claymation of prehistoric species shows the ways in which odd shapes evolved into forms we know today. The Musk Ox's circle dance and the Armadillo's shell game are explained. Also seen are the one-in-a-million white Moose, and the confused courtship of a prairie Grouse hybrid.

The Pronghorn Antelope of these vast western prairies is, in fact, not an Antelope at all. Instead, it's the sole member of its own unique family and it's an original American it evolved right here on this continent. Most of the other mammals with hooves that now live in North America migrated here from Asia by way of a land bridge. By comparison, the Pronghorn originated here. Its ancestors lived here at least two million years ago. Other creatures of that era including its major large predators have long since vanished. The Pronghorn alone survived into the twentieth century. In this land of many predators and few hiding places it developed phenomenal speed. This fascinating creature, fastest in North America is with us today because it was "BORN TO RUN".

As the rising sun first brightens America's wildlife habitat, the morning sun moves across our continent. It will warm the wide range of the family of owls. There are 18 different species here in North America and they range in size from the tiny elf owl no bigger than a bluebird to the rare, great gray owl with a wingspread of five feet. The sun makes its way over the southern swamps of the barred owl, the central woodlands of the great horned owl, the western prairies of the burrowing owl, and finally sets beyond the northern tundra home of the snowy owl. The gathering dusk casts its magical spell, and life begins to stir in the deepening twilight. Gliding on hushed wings, and striking with lightning speed are the supreme hunters of the night, the "OWLS LORDS OF DARKNESS".

Many thousands of these intelligent creatures roam the woods from Georgia to California. Some, bristling Boars with huge tusks, were imported from Europe and released as formidable hunting adversaries. Others are escaped barnyard swine. Only one is native -- the Peccary of our southwestern deserts. This program explores the funny, bizarre, violent world of the Wild Hog.

Antlers are the peculiar property of the deer family. No other creature in the world has this special kind of structure on its head. Worn by the males, and females of some species, the most amazing thing about antlers is they fall off. They shed them in winter every year and grow new ones in time for the next autumn mating season. That's an amazing amount of growth! Mother Nature has graced few of her children with as stately a symbol of beauty and strength as this antlered crown. It's only one of their adaptations. Since they first crossed the Bering Sea land bridge to arrive in America from Asia three million years ago, the deer family has been adapting to a wide variety of habitats from Alaska all the way down to Florida. That's why there are so many kinds of them. The family of Deer, Elk, Moose and Caribou have only a few members which are endangered. Instead, we find our most commonly sighted and some of our most popular large animals within this "ANTLERED KINGDOM".

America's Birds come in all shapes and sizes, and they range from homely to breathtaking. But they share one thing in common -- the awesome power of flight. The airborne freedom which sets Birds apart from other creatures has been envied by man for centuries. All the diverse Bird types are seen -- powerful predators, melodious songbirds, and graceful water birds.

We all know domestic cats. We've seen them savagely attack a ball of yarn, contentedly purr on our laps, and instinctively sharpen their claws, probably on our best furniture. Yet, we rarely have the opportunity to see their secretive wild cousins, the most elusive of all animals - and the most deadly. It's hard to believe that the mountain lion is a not-too-distant relative of this tiny kitten. But these sharp claws are common characteristics of all felines-useful for catching and killing prey, retractable when the cat needs to move quickly. And these eyes-narrowed to a slit in daylight-can open wide in darkness, allowing the cats to be effective nocturnal hunters. In form and function, wild cats gracefully reach the peak of predatory evolution. But in order to fully understand the reasons for these sophisticate adaptations, we must look deeper into the hidden world of America's "WILD CATS".

Marty Stouffer is studying wildlife in a remote Colorado wilderness. One spring day, he comes across the tracks of a Grizzly Bear -- thought to be extinct in the state -- and he follows and meets face-to-face with a magnificent male Grizzly. Excited by his discovery, Marty adopts a female Grizzly cub from a zoo. He and Griz share a cabin as Marty teaches her how to survive.

Over the summer, the adventurous cub encounters many other creatures, among them a hungry Cougar. As winter approaches, Marty digs a den for Griz, and while she sleeps, he goes off to observe wildlife which does not hibernate. In April, Griz emerges from her den, and must learn one last lesson -- to fear humans, even Marty. This separates man and bear forever.

Some wild animals have not only survived our progress, but are actually thriving within numerous urban areas. Raccoons, Deer, Coyotes, Skunks, and a wide variety of Birds are adapting to a world shared increasingly with humans. Backyard wildlife is a never-ending joy for wildlife watchers. Also included in this program are tips for attracting creatures to your own backyard.