To protect their young from predators, these barnacle geese chose to make their nest on this 400ft precipice. The only problem: what goes up must come down. See more stories of incredible animals on Hostile Planet, premiering Monday April 1 at 9/8c | National Geographic TV

Barnacle geese breed in the mountains, safe from predators but far from food. The problem? Chicks need to eat within 36 hours of hatching—but won't be able to fly for another month. #HostilePlanet is streaming now on Disney | National Geographic TV