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IN BRIEF
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In the darkness of a Cambodian caveBiologists have stumbled upon a creature straight out of a dream: a turquoise viper with an improbable color, capable of detecting the heat of its prey thanks to a heat-sensitive organ on its head. This discovery, made in the heart of an isolated limestone labyrinth, challenges our ideas about theadaptation and the diversity animals in long-ignored underground habitats. Researchers realize that every crevice and every hill may still be hiding unknown species and surprising evolutionary mechanisms.
Summary — In the karst cliffs of CambodiaAn expedition explored 64 caves and unearthed at least 11 unknown speciesincluding an incredible turquoise viper equipped with an organ thermosensitiveAmong snakes that “see” heat, reptiles capable of hover From tree to tree and geckos in full speciationThese discoveries challenge our understanding of subterranean adaptation—while highlighting the urgent need to protect these “biological islands” threatened by limestone extraction and uncontrolled tourism. For more information, several detailed reports are available in the press: 20 Minutes, TVA News, MCETV / Ouest-France, The Good News And Justice for Cambodia.
A limestone landscape as the setting for a naturalist investigation
The cliffs of karst Cambodian caves cover an immense area — more than 20,000 km² — and contain a network of tunnels and sinkholes that resemble an adventure novel. Between November 2023 and July 2025, a joint team of Fauna & Flora and of Cambodian Ministry of the Environment explored 64 caves spread across ten hills in the province of BattambangEach hill turned out to be, quite literally, a small biological planet in its own right.
Biologists have compared these hills to organic islands Isolated, each follows its own evolutionary trajectory. This phenomenon explains why a single species of gecko can develop into four distinct populations, each taking its own evolutionary path. The expedition director, Pablo Sinovas, sums up the situation bluntly: in these cavities, “taking anything and everything” almost always leads to a scientific surprise.
The turquoise viper: an apparition straight out of a fairy tale
Among all the finds, the turquoise viper is undoubtedly the most spectacular. Its color, an almost supernatural blue-green, is extremely rare among venomous snakes and immediately catches the eye. But it’s not just its chromatic plumage that intrigues researchers: on its head is a specialized organ capable of detecting variations in temperature — a true biological infrared sensor.
This organ, comparable in function to the thermosensory pits of known vipers, allows the reptile to locate its prey in the total darkness of caves. Imagine a predator that “sees” heat; the adaptation is so ingenious that it challenges preconceived notions about the limits of animal vision in subterranean environments.
For those curious to get a journalistic overview of this discovery, the article by 20 Minutes offers a very accessible summary.
What does science say about this heat-sensitive organ?
Herpetologists believe this organ is a direct response to life in darkness: without light, detecting heat becomes a decisive advantage for hunting. The existence of such an adaptation in a recently discovered species prompts us to reconsider the frequency and diversity of these mechanisms in isolated habitats. Each cave, as a micro-ecosystem, can foster radical and unexpected evolutionary solutions.
The gliding snake: another star of the expedition
While the viper attracts static gazes, the ” hovering snake ” offers an aerial spectacle. This reptile has the ability to flatten its body and undulate in the air to glide from tree to tree — a mode of locomotion worthy of nature’s most daring acrobatics. Its presence was completely unknown in this region before the mission.
The nighttime outings proved particularly productive: torches in hand, the scientists inspected crevices and branches, discovering several new geckos, two micro-snails, two millipedes, and other species still awaiting official classification. For a full account of the discoveries, see the report by TVA News.
Adaptation and mobility: gliding flight in reptiles
THE planing In snakes, this is not just a feat of balance; it is a strategy for exploring the canopy, escaping predators, and colonizing new territories. Discovering such behavior in an isolated karst landscape reinforces the idea that evolution can produce identical convergent responses in separate niches.
Each of the hills, a living laboratory
The biologist Lee Grismer He compares each hill to a natural experiment conducted over millions of years. What makes these places exceptionally precious is their isolation: populations evolve without mixing, allowing the emergence of unique adaptations.
The 11 new species identified may only be the tip of the iceberg. On a single hill in the Banan district, researchers have cataloged 14 previously unknown caves — so many treasure troves where life has found novel solutions.
Immediate threats: extinction before discovery
The beauty of these discoveries clashes with a brutal reality: limestone extraction for cement, the uncontrolled tourismHunting and fires directly threaten these fragile habitats. Destroying a hillside erases millions of years of evolutionary history and condemns to death species that will never be named.
As several press articles remind us, a race is on between science, which is trying to document biodiversity, and industry, which is transforming the landscape at a breakneck pace. To delve deeper into the current situation and local implications, see the stories published on MCETV / Ouest-France And The Good News.
Why losing species is more serious than we think
Losing an endemic species is like losing a book of unique genetic, ecological, and physiological solutions. Every adaptation—from the organ thermosensitive to the capacity of hover — is a natural innovation that could inspire biomimetic research, medicine, or simply enrich our understanding of life. Its silent extinction before discovery deprives humanity of an irreplaceable heritage.
What to do now?
The discovery sparked a wave of protection and awareness efforts: mapping the caves, creating protected areas, working with local communities to limit destructive exploitation, and developing sustainable tourism that prioritizes conservation over exploitation. Local and international organizations are beginning to mobilize to ensure these “natural laboratories” remain untouched.
For a comprehensive overview and proposed actions, see the survey published by Justice for Cambodia details the challenges of preservation and the calls for responsibility.
A message of wonder and urgency
Discover a turquoise viper In a cave, it’s like finding a forgotten page in an old tome: it reminds us that the planet is still full of wonders and lessons. But it’s also a warning: nature will not always be forgiving in the face of destruction. The scientists’ flashlight illuminates these hidden beings today; tomorrow, we must hope that this beam hasn’t disappeared beneath the rubble of concrete.
FAQ — Mystery and colors: the turquoise viper of the Cambodian caves
Q: What exactly was discovered in these caves in Cambodia?
A: The expeditions have uncovered a surprising collection: approximately 11 species previously unknown, including a turquoise viper with an unreal appearance and a snake capable of gliding, as well as several geckos, micro-snails and millipedes.
Q: Where did these discoveries take place?
A: In the province of Battambang, in the heart of a vast landscape karst — a network of limestone cliffs and caverns that covers thousands of square kilometers and is home to hundreds of little-explored caves.
Q: Who led the expedition?
A: A joint team from the NGO Fauna & Flora and of Cambodian Ministry of the Environmentaccompanied by international biologists, excavated these cavities between November 2023 and July 2025.
Q: Why are these hills so special for evolution?
A: Each hill functions like a organic island isolated: the populations there evolve separately, which promotes the speciationResearchers have also found several distinct populations of the same gecko that follow different evolutionary trajectories.
Q: What makes the turquoise viper so remarkable?
A: Besides its unusual color among venomous snakes, it possesses a heat-sensitive organ on its head — a kind of biological infrared sensor that allows it to detect the heat of its prey in the total darkness of caves.
Q: The “flying snake” has been discovered; how does it move?
A: This reptile can flatten its body and undulate to hover from tree to tree, a spectacular adaptation that allows it to move without touching the ground — a valuable strategy in a forest fragmented around cavities.
Q: How many caves were explored and how was the terrain excavated?
A: The teams surveyed 64 caves spread across a dozen hills, often at night with flashlights, inspecting cracks, stalactites and branches to spot every hidden insect or reptile.
Q: Are these species protected or endangered?
A: Many habitats are already threatened: limestone miningUncontrolled tourism, hunting, and fires are endangering these organisms. Some species could disappear. Before even having received a scientific name.
Q: What is the impact of limestone extraction on these caves?
A: Extraction directly destroys karst and caves, eliminating unique ecological niches. When a hill is home to endemic species, habitat loss often equates to local extinction—sometimes permanent.
Q: What do scientists say about these discoveries?
A: Researchers emphasize the almost experimental nature of each hill: as one expedition leader summarized, simply exploring a cavity often reveals something new. Other experts point out that these limestone mounds are irreplaceable evolutionary laboratories.
Q: How will these new species be named and described?
A: The specimens must be studied in the laboratory, compared to existing collections, and formally described in scientific publications. The process can take time—hence the fear that the habitat might disappear before the official publication.
Q: What can the general public do to help?
A: Supporting organizations that work to conserve karst raising awareness of responsible tourism and promoting sustainable limestone exploitation practices are useful steps to preserve these fragile ecosystems.