In Europe's Carpathian mountains, the introduction of bison is helping numerous other species to thrive, while just beyond this mountainous region, Gray wolves are staging an astonishing return.

Across Iberia rare species are making a comeback thanks to rewilding efforts.

In Europe, efforts to save the bear are helping numerous other species to thrive.

The Danube is the largest preserved wetland on the continent, a sanctuary for thousands of species - many are the last of their kind. Conservationists are working to preserve and restore these precious habitats before it's too late.

A revival of predators, prey and scavengers are restoring the Eastern Rhodopes' circle of life.