The Glacier's Smiling Messengers: Taiwan's Hynobiid Salamanders and a Century of Scientific Devotion

30-second overview: Buried within Taiwan's subtropical island are five glacial relict species — hynobiid salamanders. They survive quietly in cold mountain stream headwaters above 2,000 meters, their rounded eyes and gently upturned mouths earning them the nickname "smiling alpine spirits." From a century of misidentified names to decades of scientists tracking them across treacherous peaks — and one who gave his life doing so — the salamander story is an ecological miracle and a profound reflection on humanity's coexistence with nature. In 2023, Taiwan Mobile and Professor Zhu You-tian's team at National Taiwan University successfully achieved artificial incubation, bringing new hope for the future of these mountain spirits.

Messengers of the Ice Age: The Remarkable Origins and Smiles of Taiwan's Salamanders

In 1919, Japanese scholar Nishimura Jinhaku collected an unprecedented amphibian specimen on Alishan, opening the chapter on salamander research in Taiwan¹. These creatures called "mountain pepper fish" (山椒魚 — the name derives from the peppery scent of their skin secretions) are actually members of Order Caudata, Family Hynobiidae². They are among the oldest amphibians on Earth, with ancestors traceable to the Carboniferous Period some 300 million years ago — older than the dinosaurs³. Their round eyes and gently curved mouths have earned them the epithet "smiling alpine spirits."

Taiwan sits in the subtropics, yet harbors five endemic salamander species — itself a counterintuitive ecological miracle. Taiwan's salamanders represent the southernmost distribution of the genus Hynobius in the world and its only subtropical population, giving them a distinctive position in evolutionary biology⁴. Scientists theorize that their ancestors migrated from the Asian continent to Taiwan across land bridges millions of years ago during ice ages⁴. When the glacial period ended, sea levels rose, the land bridges disappeared, and these cold-adapted animals were "stranded" in Taiwan's high mountains, evolving into distinct species. They chose to inhabit stream headwaters above 2,000 meters in perpetually cold, humid conditions — these alpine environments became their "glacial refugia" on a subtropical island⁴.

Mitochondrial DNA analysis shows that Taiwan's five salamander species share a common ancestor, diverging from mainland Asian salamanders approximately 4.5 to 8 million years ago (average 6.38 million), with diversification within Taiwan occurring approximately 2.5 to 4.5 million years ago (average 3.56 million)⁵. The Guanwu salamander genetically separated earliest from the Japan/Asian continent lineage; the remaining four divide into two branches (Sonan's and Alishan are phylogenetically closer; the Formosan and Nantou form another branch)⁵. This genetic evidence illuminates Taiwan's geological changes and climate history, proving these salamanders are an important component of global biodiversity.

📝 Curator's note: Finding Ice Age living fossils on a tropical island is one of the most captivating paradoxes in Taiwan's ecology. Their smiles are a serene testament spanning millions of years.

A Century of Misidentification: The Long Journey to Correct Classification

The history of salamander research in Taiwan is full of twists and drama. For a full century, the scientific community maintained a "mixed-up" classification of two salamander species⁶. In 1922, Japanese scholar Maki Moichiro published descriptions of the Formosan salamander (Hynobius formosanus) and Sonan's salamander (Hynobius sonani) based on morphological differences⁶. However, because the type specimens may have been lost in the 1923 Great Kanto Earthquake, combined with imprecise early descriptions, subsequent researchers comparing type specimens with field populations found that the two descriptions were reversed — the labels had been swapped⁶.

After years of back-and-forth between Taiwanese and Japanese scholars, Shei-Pa National Park headquarters officially announced in January 2025 that what had long been misidentified as the Formosan salamander was actually Sonan's salamander, and what had been misidentified as Sonan's was in fact the genuine Formosan salamander⁶⁷. This century-long "identity swap" was finally resolved through scientific effort, highlighting both the rigor and the challenges of biological taxonomy. After reclassification: Sonan's salamander is characterized by yellow spots on the body and four toes on both fore and hind limbs, with its primary range along Shei Mountain's western ridgeline from the main peak to Siyuan Pass and connecting Central Range areas; the Formosan salamander has reddish-brown or blackish-brown coloration with block-shaped markings, four fore-toes and five hind-toes (fifth partially reduced), distributed in the central-northern Central Mountain Range⁶⁷.

Among the many scholars who invested their life's work in Taiwan's salamander research, Professor Lu Guang-yang — Emeritus Professor in Life Sciences at National Taiwan Normal University, known as "Grandfather Salamander" — has been the most iconic figure. From the 1980s onward he committed himself to salamander research, leaving his footprints across Taiwan's high mountains⁸. He and his team described new species including the Guanwu and Nantou salamanders, establishing an essential foundation for salamander taxonomy and conservation⁸. Lu's early fieldwork includes the anecdote of first discovering salamanders in wasabi fields on Alishan (human-disturbed environments that accidentally created suitable microhabitats), and even confirming their distribution when a snake regurgitated several Alishan salamanders — all testifying to the hardship and serendipity of early field surveys⁹.

Yet this research path was also full of hardship and danger. In 2016, Dr. Lai Jun-xiang — one of Lu Guang-yang's students, equally dedicated to salamander research — fell from a cliff to his death while climbing Qilai North Peak on a survey mission¹⁰. This tragedy shook the academic community and cast a note of tragic heroism over salamander conservation efforts. Dr. Lai's sacrifice reminds us of the price humans pay in exploring and protecting nature. His widow, Ms. Xie Wei-chun, appeared at the special screening of the documentary Salamanders Are Here with her two children, bowing deeply to thank the rescue teams from those difficult days — a scene that moved everyone present¹¹.

Taking up Dr. Lai's research was Professor Zhu You-tian from National Taiwan University's Department of Animal Science and Technology. From 2016 onward, Zhu's team extended the salamander research, completing comprehensive geographic distribution maps, genetic structure, phylogeography, and life history surveys for all five species — including skeletal and reproductive system imaging analysis — and discovering that their diet consists primarily of insects¹². His arrival ensured the continuity and deepening of Taiwan's salamander research.

📝 Curator's note: Resolving a century of misidentification is a scientific triumph and a tribute to the countless surveys and sacrifices of earlier scholars. Every research finding carries with it love for and reverence toward life.

Behind the Smile: Fragile Survival and Severe Challenges

Taiwan currently has five endemic salamander species, each inhabiting the headwaters of different river systems across Taiwan's high mountains, with clearly allopatric distributions — habitats mostly non-overlapping, with rare cases of adjacent or sympatric ranges. This is evidence of Taiwan's rich genetic diversity⁴. Their conservation status is mostly Critically Endangered at Level 1 (Taiwan's highest domestic category), with the Nantou salamander classified as Critically Endangered under the national system¹³.

Salamanders are extraordinarily sensitive to their environment — they require year-round low temperatures (approximately 8–16°C), moisture, and clear water to survive. Adults are mostly active beneath leaf litter or in rock crevices in coniferous and arrow-bamboo forests; breeding season occurs mainly in winter, using temporary water bodies (formed by winter rainfall or snowmelt)¹⁴. This makes them direct victims of and indicator organisms for climate change¹⁵. Global warming is driving rising alpine temperatures and altered rainfall patterns, with decreased winter snowfall directly threatening salamander breeding and survival. For example, insufficient winter rain or snowmelt reduces the water bodies suitable for salamander reproduction, while frequent heavy rains can wash away egg sacs¹⁵. Under extreme climate conditions, consecutive winter seasons with insufficient precipitation or snowmelt cause reproductive failure; the breeding season spans 5–6 months¹⁶.

Beyond climate change, the impact of human activity cannot be ignored. Policies opening mountain areas to the public allow more people to enjoy nature, but also bring recreational pressure and environmental damage. Garbage along hiking trails, water source pollution, urination off-trail, stepping off marked paths, and flipping stones — all of these disturbances can deal fatal blows to fragile salamander populations¹⁶. The Nantou salamander in particular suffers enormous recreational pressure since its habitat is adjacent to the Nantou Mountain Hut; during some monitoring periods, not a single individual was recorded¹⁶. Furthermore, salamanders have high site fidelity and extremely small home ranges (individual annual movement distance is only approximately 14 meters), making them especially vulnerable when facing environmental change¹⁶.

📝 Curator's note: Their smile may be an imprint left by the Ice Age — yet it also reflects the most severe survival challenge of the 21st century. These alpine spirits are sentinels for the health of Taiwan's mountain ecosystems.

Hope and Technology: A New Chapter in Salamander Conservation

Despite the severe challenges, new hope has arrived for Taiwan's salamander conservation efforts. In 2022, the Forestry Bureau (now the Forestry and Nature Conservation Agency) published the Taiwan Salamander Conservation Action Plan, providing clear direction for the conservation strategies for each species¹⁷. This plan incorporates the Wildlife Conservation Act, Wetlands Conservation Act, and the Central Mountain Range Conservation Corridor within Taiwan's overall conservation policy framework.

More exciting still: beginning in 2023, Taiwan Mobile and Professor Zhu You-tian's NTU team launched a cross-sector collaboration, bringing technological capacity into salamander conservation. They achieved a breakthrough in artificial incubation technology: the Guanwu salamander's hatching rate reached 95%, and the Alishan salamander's reached 100%¹⁸. These are the first precious images ever recorded of salamander fertilized-egg development, parental care behavior, and incubation — providing critical techniques for captive breeding and wild population restoration. The project incorporated AIoT monitoring technology to precisely record microenvironmental data and conduct field breeding habitat experiments (such as installing artificial covers), while also preserving genetic material via liquid nitrogen and ultra-low temperature equipment to establish gene banks for multiple endemic Taiwanese species¹⁸. That same year, Taiwan Mobile signed memoranda of understanding with Yushan National Park and the Forestry and Nature Conservation Agency to jointly promote salamander conservation — a model of corporate social responsibility and cross-sector collaboration¹⁸.

Cross-sector coordination also continues: Shei-Pa, Yushan, and Taroko — Taiwan's three high-alpine national parks — jointly commissioned Zhu's team to conduct surveys monitoring microclimates and chytrid/salamander fungal pathogens (none yet detected in Taiwan's salamanders), ensuring the health of habitat environments¹². Long-term mark-recapture studies have also shown that individual salamanders can live more than 10 years, demonstrating a degree of resilience¹⁶. These positive measures, combined with public education initiatives, together paint a hopeful picture for Taiwan's salamander future.

Protecting the Glacier's Smile: The Path Forward for Taiwan's Ecological Conservation

Salamanders are Taiwan's precious endemic species and important indicators of whether high-alpine ecosystems are healthy under global climate change. Their environmental sensitivity means that population trends directly reflect the pressures facing alpine ecology. Protecting salamanders means protecting the integrity and biodiversity of Taiwan's high-mountain ecosystems.

In recent years, as director Mai Jue-ming's seventeen-years-in-the-making documentary Salamanders Are Here reached audiences, and as scientists continued their tireless efforts, more and more Taiwanese citizens have come to know and care about these "messengers of the ice age"¹⁹. Institutions such as the Taipei Zoo have held the "Enter the Mountain Island" salamander special exhibition, presenting the latest research findings and calling on the public to take climate action, avoid pollution and disturbance while mountaineering²⁰. This wave of attention has brought new hope for conservation efforts. Yet the conservation road remains long and full of challenges. Beyond ongoing scientific research and habitat monitoring, it requires the joint participation of government, academia, civic organizations, and the broader public.

Raising public awareness of salamanders, promoting responsible mountain activities, reducing human disturbance to habitat, and integrating ecological conservation values into the education system — these are urgent and indispensable tasks. Only by helping more people understand the unique value and fragility of salamanders can we gather sufficient force to let these "smiling spirits" — who have survived millions of years of evolution from the Ice Age to the present — continue to reproduce in Taiwan's alpine streams and become an enduring symbol of Taiwan's sustainable ecological development.

📝 Curator's note: The survival of salamanders concerns the continuation of a species — and tests whether we can leave the next generation a Taiwan that coexists harmoniously with nature.

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