In the foggy forests between Vietnam and Laos, a rare creature known as the saola, often called the “Asian unicorn,” still eludes discovery. This unique animal resembles an antelope but is closely related to cattle. Both male and female saolas boast long, straight horns that, from the side, evoke the image of a unicorn.
Unfortunately, this mysterious creature is facing significant threats. Fewer than 100 saolas are believed to remain in the wild. The last confirmed sighting dates back to 2013, and Nguyen Quoc Dung, a researcher at the Forest Inventory and Planning Institute in Vietnam, admits we can’t be sure if any saolas exist today.
A recent genetic breakthrough has offered a glimmer of hope. Researchers from the University of Copenhagen and other international institutions have successfully mapped the saola’s genome, which was previously unknown. They used remains from local hunters to create complete genomes for 26 individuals. Their findings reveal two distinct populations of saolas that diverged between 5,000 and 20,000 years ago.
“The surprise was the significant genetic difference between these populations,” said Genís Garcia Erill, the study’s lead author. This genetic split raises hope for conservation efforts: mixing individuals from both populations could revitalize their genetic diversity.
Unfortunately, the two populations have been declining for thousands of years. Their numbers likely never exceeded 5,000, resulting in a worrying loss of genetic variation. Scientists believe that by breeding saolas from both populations, they might create a healthier, more viable group.
To test their theories, researchers modeled various conservation scenarios. They suggest that establishing a breeding program with at least a dozen saolas, ideally including individuals from both groups, is the best path for long-term survival. Rasmus Heller, another researcher involved, highlighted that previous attempts to save near-extinct species through similar breeding initiatives have seen success.
Locating surviving saolas remains a challenge. Efforts have employed environmental DNA techniques to find traces of their genetic material in soil and water. So far, these methods have proved difficult, but the newly mapped genome provides a larger toolkit for researchers to work with.
Even if saolas are never found again, this genome information could help in other ways. Heller noted that advancements in genetic technology may one day allow for the resurrection of extinct species. Insights into the saola’s genetic makeup could play a crucial role in such efforts.
As research continues, a sense of urgency surrounds the saola’s situation. Scientists have been searching since the 1990s, and the odds of finding the creature have dwindled. “I’m not overly optimistic,” Heller admitted, “but I truly hope the saola is still out there.”
For more in-depth scientific insights, check the full study published in the journal Cell here.