Along the Snake River in southwestern Idaho is the world's largest concentration of golden eagles and Prairie falcons. Marlin participates in the research and observations.

Again Marlin participates in the study of the golden eagle as it nests in the canyon cliffs and hunts for food in the plateaus.

Marlin and Dick Denney observe the wildlife along the shores of Argentina's Patagonia.

The U.S. Forest Service in Alaska and Dick Denney attempt to discover if the dusky Canada goose might be in jeopardy because of an earthquake, which occurred over a decade ago.

Filmed in the Canadian Rockies this is a species story dealing with a day in the life of a Canada lynx.

Dick Denney and Dr. Bruning of the New York Zoological Society, "walk across the Pampas" and observe some of Argentina's most interesting bird life.

Part I shows the Norwegian natives and how they raise, herd and use their reindeer, which is the basis of their economy.

Part II concludes on how the Norwegian natives and how they raise, herd and use their reindeer, which is the basis of their economy.

This is a look at the life of the wolf and the bobcat raising their families in the mountains of the Monti-LaSal National Forest located in southern Utah.

Marlin journeys to Tanzania to observe primate research being conducted among the chimpanzees that live near the shores of vast Lake Tanganyika.

Marlin travels to the Hawaiian Archipelago, Leeward Islands, to observe the activities of the sea birds, which live there.

Marlin Perkins joins a husband-wife scientific team in Tanzania, east Africa to observe their continuing five-year research into the life of the wild dog.