Live from the home to some of America's most iconic animals, the team is on the lookout for migrating elk which move through Yellowstone in their thousands. From the super-volcano, home to iconic animals, the helicopter team is on the lookout for elk and wolves, while on the ground it's all about the beaver and black bear families. A team investigates the devastating impact of earthquakes in the area.

From the super-volcano, the park is home for a wide range of iconic American species. There's heavyweight action as the bison rut reaches its peak. Three huge grizzly bears do their utmost to get into bear-resistant containers.