11 captive elephants were released into the wild. Five years later, researchers found this

Eleven elephants spent years behind fences, hauling tourists or performing for crowds. Then South Africa set them free. Now, half a decade later, scientists have an answer to the question that hung over the whole experiment: could these elephants actually make it on their own? The answer, according to new research, is yes, and it's not even close.

A study published July 29 in the journal PLOS One followed 11 formerly captive elephants released into four fenced reserves across South Africa. After five years of watching them, researchers say the animals ended up behaving almost exactly like elephants that had never known captivity at all.

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The project was led by Tenisha Roos and Tamara Eggeling of the Elephant Reintegration Trust of South Africa, working alongside researcher Brett Mitchell and a broader team. Their findings offer some of the strongest evidence yet that elephants pulled from the wild years or even decades earlier can still find their way back to something resembling a normal life.

Five Years, Four Reserves, One Big Question

The 11 elephants in the study, a mix of adult females, adult males, and younger females, represented more than half of South Africa's entire rewilded elephant population at the time. That alone tells you how small and precarious this world is: fewer than two dozen elephants nationwide have ever gone through this kind of release.

To track their progress, researchers didn't just check in once and call it done. They observed each elephant for three-week stretches at least once a year, every year, for five straight years. They watched for red flags, repetitive self-touching, aggression, jumpiness, the kinds of behaviors that can linger from trauma or long-term confinement.

They also got their hands dirty, literally. By collecting dung samples, the team measured stress hormones called fecal glucocorticoid metabolites, or fGCMs. It's a common, non-invasive way scientists gauge how an animal's body is handling its environment, without ever having to lay a hand on it.

What They Found

Mostly, normal. Genuinely, remarkably normal.

The rewilded elephants' behavior lined up closely with their wild-born counterparts. There were a few wrinkles, rewilded adult males and younger females were somewhat less alert to their surroundings than wild elephants, and adult and younger females showed slightly elevated stress hormones. But researchers were careful to note that every single hormone reading stayed within the healthy range seen in wild populations. Nothing pointed to chronic stress or lasting harm.

Interestingly, not every elephant reacted the same way. Some showed a tight link between how they behaved and what their hormones revealed. Others didn't. Roos and her colleagues think individual personality plays a bigger role in adaptation than anyone previously gave it credit for, some elephants, it turns out, just handle change better than others, the same way people do.

Why So Many Elephants Are in Captivity to Begin With

South Africa currently has roughly 88 captive elephants spread across 22 facilities, most of them originally captured for tourism or commercial use rather than any conservation purpose. They typically live in groups of fewer than 10, a fraction of the size of the sprawling, tightly bonded families elephants form in the wild.

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That mismatch takes a toll. Confinement and limited social contact have been linked to pacing, aggression toward handlers, and compulsive self-touching. Researchers say the psychological scars can resemble something like post-traumatic stress disorder, on top of whatever trauma came from being captured in the first place.

Rewilding is the slow, deliberate process of undoing that damage, weaning elephants off human dependence step by step until they're finding their own food, navigating unfamiliar terrain, and rejoining a social world built on elephant terms, not human ones.

In Their Own Words

Roos said watching decades-long captives fall back into wild rhythms was one of the most rewarding parts of the entire project, calling it proof of just how resilient and adaptable elephants really are.

Eggeling, for her part, pushed back on the idea that a traumatic past locks an elephant into a certain kind of life. Captive elephants may carry memories of confinement, she said, but her team's research shows they're still capable of moving past it, learning, adapting, and ultimately thriving once they're given the chance.

Mitchell framed the results in bigger-picture terms, pointing to what they mean for elephant conservation across the wider region. Released elephants, he said, don't just survive, they can reclaim their independence, fall back into natural movement patterns, and end up contributing to the survival of the species itself.

The Catch

Here's the honest caveat: 11 elephants is not a lot of elephants. Even though this group made up more than half of South Africa's rewilded population, that's a reflection of how rare successful rewilding programs still are, not a sign the sample size was ideal.

The research team already has bigger plans. Future studies aim to track larger groups across multiple countries, building a fuller picture of what makes rewilding succeed, and helping more captive elephants, someday, make the same journey these 11 did.