In the autumn of 2025, wildlife researchers in the French Alps made a discovery that sounds more like myth than science. A frail bearded vulture found lying weakened on the ground turned out to be Balthazar — a bird released into the wild in 1988, who had vanished from observations years ago and was presumed dead.
At over 37 years old, Balthazar is the oldest bearded vulture ever recorded in the wild. And his story is inseparable from one of the most remarkable conservation triumphs of the past century.
A bone-breaker's return
Bearded vultures are extraordinary creatures. With wingspans stretching beyond 2.5 metres — roughly the width of a front door — they are among Europe's most imposing raptors. But it's their diet that truly sets them apart. They are believed to be the only animal on Earth that is ossivorous: they eat bones.
The Spanish call them quebrantahuesos — bone-breakers — for good reason. These birds scavenge bones from carcasses, carry them skyward, and hurl them onto rocks from great heights to shatter them into digestible pieces. They even maintain favourite smashing sites, known as ossuaries, near their nests.
Yet for all their resilience, bearded vultures couldn't survive human persecution. Wrongly believed to snatch lambs and even small children — the old German name Lämmergeier means "lamb-vulture" — they were hunted and poisoned across the Alps. The last one was shot in Italy's Aosta Valley in 1913.
For decades, the Alpine skies were empty of them.
264 birds, four decades, one mission
The effort to bring them back began in 1986, when conservationists released the first captive-bred bearded vultures into Austria's Hohe Tauern National Park. Over the following decades, the Vulture Conservation Foundation and its partners released a total of 264 birds across Austria, France, Switzerland, Italy, and Germany.
Balthazar was among that early wave. He went on to father the first wild-bred chick in the Alps since the species' extinction — a milestone reached in France in 1997. Since then, he has fathered 15 wild-born chicks, whose descendants now number more than 30.
By 2025, the population had grown to around 450 birds, with 118 breeding pairs — the first time the count had surpassed 100. At least 589 chicks have fledged in the wild. The population is now considered self-sustaining.
"It's a huge success, demonstrating that when there is will and a little bit of funding and a little bit of political support, we can actually reverse the loss of biodiversity and achieve fantastic results," José Tavares, director of the Vulture Conservation Foundation, told the BBC.
The wisdom of old wings
Research by Julien Terraube, a senior researcher at the French Biodiversity Agency, helps explain why long-lived birds like Balthazar matter so much to recovery efforts. His team's analysis found that older vultures are simply better parents — more skilled at choosing sheltered cliff nests, finding food, and defending their young against predators like ravens.
"The longer the breeding pair has been together, the better they were as parents, and the higher their breeding success," Terraube told the BBC.
Bearded vultures begin breeding around age eight and can continue into their 30s. Each year sharpens their ability to raise chicks in punishing mountain conditions — nests sit at around 2,000 metres above sea level, and young birds don't leave them until four or five months after hatching.
Looking up
The bearded vulture remains the most threatened vulture species in Europe, with just 309 breeding pairs spread across the Alps, the Pyrenees, and a handful of islands. Illegal killings still occur — an X-ray of Balthazar's foot revealed a lead pellet from an old shooting, a stark reminder that persecution endures. But in the Alps, the trajectory is unmistakably upward.
Tavares put it simply: "We have reached the point where we are nearing the end of this project, because it has been very successful."
Balthazar himself is now in captivity, under the care of the team that first released him 37 years ago — the same conservation programme, some of the very same people, bringing his extraordinary story full circle. In captivity, bearded vultures can live beyond 50. His story is far from over.
