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Observe red squirrels in their home environment high up in the treetops as they engage in lovable antics, hide from predators and battle for food.

The summits and sheer mountain ridges of Austria’s "Little Siberia" funnel the freezing air from snow-covered peaks into a gigantic hollow – a high-level plateau at 1,000 metres from which it cannot escape: Lungau is Austria’s coldest region. Creeks and streams start higher here, and create bogs, moors and countless alpine lakes. Summer is short but lively, as eagles rear their precious young and ermines eat their fill before the sparse winter returns, while black alpine salamanders give birth to live miniature versions of themselves beneath the tree-line.

The bears are back. Once scarcely seen in central Europe, shaggy 300 kg brown bears, are once again padding through Slovenia's Alpine forests and crossing borders into Austria and Italy. In these limestone ranges within sight of the warm Mediterranean, they hardly ever come into conflict with people - unless they sense the presence of honey. This film opens our eyes to bears' enormous power, intelligent curiosity and surprising habits: some bears hibernate with bats that huddle together and even mate in their cave, unfazed by the slumbering giant beneath. Biological research tells us the brown bear is an infallible indicator of intact biospheres: Where this top predator settles, other species thrive: from large mammals like wolves and lynx, to altogether humbler residents like mushrooms, or the Carnic honeybees. And as forests reclaim fields left fallow by the rural exodus, is this a chance for bears too?