S01E01 Mountains
Only the hardiest of beasts survive in Britain's mountains and uplands, including the golden eagle and its prey the mountain hare, plus 400,000 red deer and flamboyant black grouse.
With more than 6,000 rivers criss-crossing our land, their denizens often go unnoticed. Solid bones and high oxygen levels mean a dipper bird can dive underwater for 30 seconds.
Wildlife documentary series narrated by Hugh Bonneville revealing the hidden lives of the animals that live in various habitats around Britain.