Travel through the majestic Primeval forests of the Urals. This Russian sanctuary is a land of extremes where giant deer and half-tonne leviathans. Eurasian elk make seasonal journeys in search of food. Unlike other deer, Eurasian elk are normally solitary and for pregnant females, the stress of meeting leads to fighting. As the snow retreats, opportunists like lone wolves advance to feed on winter's victims…

• Christian Brückner