Whatever walk of life, from bug to bear, we are all under threat. Every second, somewhere, something goes wrong for an animal. There’s a fight or an attack. What decides our fate? Is it predetermined who lives or dies or do we take our chances, living our lives constantly seconds from disaster? On the African…

This documentary shows how wild creatures help to build the very foundations upon which environments depend. In North America, herds of bison maintain the prairies that used to spread across the continent, while in Africa giraffes work as tree pruners and help maintain the savanna grasslands that the greatest herds on earth depend upon. In…