Bison vanished from Romania’s Carpathians for 250 years. A herd reintroduced in 2014 now stores as much carbon as taking 43,000 cars off the road, and it built a travel economy around itself.
For at least 250 years, no wild bison walked the Țarcu Mountains of the southern Carpathians. Europe’s largest land mammal had been hunted out of the wild across the continent by the early twentieth century, surviving only in zoos and fenced reserves. In 2014, Rewilding Europe and WWF Romania began trucking them back into the Romanian hills, releasing small groups onto grassland that had gone without them for longer than anyone alive could remember. Between 2014 and 2021 they moved 105 animals; today more than 170 roam free across the range, the largest wild bison population in Romania in two centuries and one of the largest free-roaming herds on the continent, fed by no one and fenced by nothing.
The return turned out to be a climate story as much as a conservation one. A 2024 analysis from the Yale School of the Environment found that a herd of roughly 170 bison grazing about twenty square miles of grassland helps the landscape draw down an additional 54,000 tons of carbon a year, close to ten times what the same ground would capture without them, an amount Yale’s own journal likened to the yearly emissions of 43,000 cars. The animals crop grass, fertilize soil, disperse seeds, and trample scrub, and that churn locks carbon into the ground. The Țarcu herd receives no supplementary feeding, which makes it a genuinely wild population rather than a managed one, and the finding built on a framework Schmitz and colleagues published in 2023 arguing that protecting and restoring wild animals belongs alongside cutting emissions as a natural climate solution.
“This is now the largest reintroduction of the Bison in Europe, breathing new life into this region and providing new opportunities for a nature-based economy,” Frans Schepers, co-founder and executive director of Rewilding Europe, said when the findings were released in 2024. “As a keystone species, Bison unlock a cascade of benefits in the ecosystem, but the scale of this result is a really nice surprise.” Oswald Schmitz, the Yale ecologist who built the model, set the global stakes higher. “Our work reveals that wild animals could substantially increase an ecosystem’s carbon budget by 60 to 95 percent, and sometimes even more, relative to cases where those animals are absent,” he said. Scaled worldwide, he estimated, restoring wildlife populations could protect and capture at least 6.4 billion tons of carbon a year, a figure he compared to the top steps the world’s climate scientists recommend.
How Carpathian rewilding became a travel category
The bison brought visitors to a place that had almost none. Before the reintroduction, tourism in the Armeniș area was close to nonexistent. Now, locals guide travelers to the herd, drive them to trailheads, cook their meals, and host them overnight, and WWF Romania built a hospitality hub, the WeWilder Campus, to organize the trade; the bison safaris themselves have run through Rewilding Europe’s own travel arm. Wildlife watching has become a small industry across the range.
In the neighboring Făgăraș mountains, where a separate group, Foundation Conservation Carpathia, runs its own rewilding, a two-night stay in a bear-watching hide runs about €526, and a day spent tracking bison on foot costs around €162. The Carpathians already hold Europe’s largest populations of brown bears, wolves, and lynx, and the returning bison give operators one more reason to bring travelers deep into ranges that used to see almost none.
The herd is still growing toward genetic safety. “Out of the 152 bison that currently roam free in the landscape, almost half have been born in the wild,” Marina Drugă, who led the WWF Romania field team, said as the population crossed a milestone. “For a bison population to become genetically viable, it needs to reach 150 mature individuals, which means a total population of around 350 to 400 animals.” The project’s backers include the European Union’s LIFE program and Cartier for Nature, the jeweler’s biodiversity fund, which helped pay to put the animals back.
Nearly half the herd has now been born in the wild, a marker of a population putting down roots rather than merely being placed. “Every bison reintroduction and every birth in the wild is a success for the conservation of these vulnerable animals,” Drugă said. “Going beyond this, they can benefit local wild nature and people in so many different ways. In this regard, they are more than a keystone species here.”
What the Țarcu results suggest is that the cheapest carbon technology available may be an animal that already existed. “These astonishing results show the potential for reintroduced wild animals to supercharge the ability of ecosystems to draw down atmospheric carbon,” Maheen Khan, climate lead at WWF-Netherlands, said of the findings. “Rewilding in this way is now clearly a major option for policymakers in the face of rapidly accelerating climate change.”
Where to stay in the Carpathians
Only one address sits at the Țarcu herd. The rest are scattered across ranges hundreds of kilometers east, in the Făgăraș and the Transylvanian foothills, where the wildlife watching and the conservation economics are just as serious.
Zabola Estate, Covasna
The strongest conservation credentials of any luxury address here, and the only one carrying a Green Key certification. The Mikes family reclaimed the 500-hectare estate after communist confiscation and restored six historic buildings into suites and rooms, with a certified organic kitchen garden and a photographers’ bear hide six kilometers into the forest. Rooms start around 760 lei a night, with bear watching from 790 (about $200 a night).
Count Kálnoky’s Guesthouses, Micloșoara
Count Tibor Kálnoky restored a scatter of Szekler village cottages into what he bills as Transylvania’s first heritage accommodation, furnished with antiques and warmed through original wood stoves. Dinner is table d’hôte in the wine cellar, and the stables keep Lipizzaners and Hutzul crosses for week-long rides.
WeWilder Campus, Armeniș
The only place to stay for the bison. WWF Romania built this village campus of architect-designed tiny houses and restored farmhouses in the foothills where the first animals were released in 2014. Ten percent of what guests pay goes to a local conservation fund, and the project has seeded a farmers’ cooperative and a trackers’ academy for village teenagers.
Bunea Wilderness Cabin and Comisu Hides, Făgăraș
Foundation Conservation Carpathia, which runs its own bison reintroduction in the Făgăraș, built these cabins and hides for guests who want bears, wolves, and lynx outside the window. Comisu sits at 1,600 meters, above the tree line; Bunea serves candlelit dinners of local organic food above Pecineagu Lake. Two nights full board runs €526 a person, and the foundation says 70 percent of its revenue stays in local communities, with all profit funding its conservation work.
The King’s Retreat, Valea Zălanului
Seven bedrooms in restored cottages around a courtyard, with no television, a wood-fired hot tub, and wildflower meadows the hosts hand out binoculars to watch. Restored under Kálnoky’s management, it is described by its operators as King Charles III’s private Transylvanian retreat. All-inclusive rates run €180 to €195 a person.
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