For more than ten years, a rumour persisted among hunters and villagers in the remote eastern highlands of Angola: somewhere in the peat bogs and miombo woodland above 4,000 feet, a small band of elephants was living almost entirely unseen. Locals called them ghost elephants. Conservationists doubted such a population could exist so far from any known herd — until a motion-triggered camera finally caught one on film in 2024, and genetic testing this year confirmed that these animals are unlike any elephants ever sampled.

A population shaped by war

Angola’s elephants were devastated by 41 years of nearly continuous conflict, first the war of independence from Portugal (1961–1974) and then a civil war that raged until 2002. An estimated 100,000 elephants were killed for ivory during that period to help fund the fighting, and by 2015 surveys put the entire elephant population of southeastern Angola at roughly 4,000 animals, scattered and wary.

Ecologist Steve Boyes, a National Geographic Explorer who has spent a decade mapping the source waters of the Okavango Delta, first heard about the ghost elephants from a village leader who said it could take months of living in the bush just to glimpse one. Boyes and Angolan conservationist Kerllen Costa, director of the Lisima Foundation‘s work in the region, spent years finding only indirect evidence: a cleared “elephant garden,” a scent on the wind, camera-trap photos of leopards and bushpigs but never the elephants themselves.

The breakthrough came through local knowledge rather than technology. Abraão António Luhoke, a former soldier and hunter from the Chokwe community, redirected the search toward the area around Cangamba after recognising elephant sign that the research team had overlooked. Within months, camera traps captured a handful of blurry frames, and by September 2024 a shaky cell-phone video confirmed what local trackers had insisted all along: the herd was real, and it was still there.

What the dung revealed

Because the elephants avoid direct contact so effectively, researchers turned to an unusual source of evidence: their droppings. Fresh dung carries a mucus layer rich enough in cells to yield usable DNA, and Boyes’s team began collecting samples on every expedition and shipping them to geneticists at Stanford University and the University of Chicago.

The results, published in May, surprised the scientists themselves. Geneticist Dmitri Petrov and senior scientist Katie Solari at Stanford’s Petrov Lab, working with postdoctoral researcher Carla Hoge at the University of Chicago, found that the highland elephants form a genetically distinct lineage unrelated to any previously sequenced population. Rather than tracing back to the nearby Okavango Delta herds in Botswana, their closest genetic relatives are elephants living hundreds of miles south in Namibia — a connection researchers cannot yet explain. From 25 dung samples collected in 2024, the team was able to identify eight individual elephants, three males and five females, and determine that the group has likely been isolated for generations.

Boyes suspects the highland elephants may descend from “Henry,” the largest land mammal ever recorded, shot in Angola in the 1950s and now held at the Smithsonian. So far, mitochondrial DNA — passed down only through the maternal line — hasn’t confirmed a link, and the question remains open.

Beyond ancestry, the fecal DNA technique gives conservationists a way to monitor a population that may never allow itself to be observed directly: identifying individuals, tracking relatedness, and estimating numbers without a single animal being disturbed.

A community holds the line

None of this research would have been possible without the involvement of the Chokwe, Luchazi and Ngangela communities whose traditional leaders control access to the land. Regional leaders such as Regedor Kaketche and Mwene Chivueka VI of the Luchazi people regard the elephants as ancestral spirits rather than ordinary animals, and their blessing — along with commitments to employ local trackers and rangers — has shaped how the research proceeds. Boyes’s long-term goal is to help build a corps of several hundred community rangers who can protect the herd while it slowly relearns to trust people again, an approach that treats conservation as inseparable from the people who share the land.

Now on screen: Ghost Elephants

The search and the science behind it are the subject of a new documentary from National Geographic, directed by Werner Herzog. Ghost Elephants follows Boyes and his team of trackers deep into Angola’s highlands in pursuit of an animal many assumed was little more than legend. The film had a theatrical run beginning in late February, aired on the National Geographic channel in March, and is now streaming on Disney+ and Hulu.

Watch the official trailer here:

Angola’s ghost elephants are a reminder of how much can survive, unseen, even after decades of upheaval — and how much still depends on the people living alongside it.