Mystery in Yellowstone

The documentary leads along the river bends of the Yellowstone National Park to unravel the mysterious disappearance of the elk. Once tens of thousands roamed the valleys, now fewer and fewer elk reach their winter grounds in the northern ranges. The film follows three researchers on their investigative journey to solve the Yellowstone puzzle: An elk biologist, a grizzly bear expert, and a specialist on the infamous lake trout – an invasive species to the National Park. With the help of ground-breaking methods they discover previously unknown connections between grizzly bears, lake trouts and elks and thus grow to appreciate the complexity – and beauty – of one of North America's most famous National Parks. (texto oficial de la distribuidora)