The Rediscovery of Lost Species in Arunachal Pradesh: A Frontier of Scientific Discovery
- Arunachal Pradesh is recognized as a globally significant biodiversity hotspot and a frontier for biological and ecological research, with over 80 percent forest cover.
- In 2024, Vaccinium piliferum, a rare wild blueberry relative undocumented for nearly 188 years, was rediscovered in Vijoynagar in Changlang district.
- New orchid species like Hemipilia basifoliata (Myodia, Lower Dibang Valley district) and Gastrodia lohitensis (Lohit district) were identified, adding to the state's over 650 orchid species.
- The Zoological Survey of India discovered three new cascade frog species: Amolops tawang, Amolops chanakya, and Amolops terraorchis.
- In 2026, a new butterfly species, Euthalia zubeengargi, was discovered in Basar, Leparada district, and named in honour of renowned singer Zubeen Garg.
- Indigenous communities significantly contribute to the conservation of Arunachal Pradesh's biodiversity through their traditional practices and extensive knowledge.
Arunachal Pradesh is celebrated for its breathtaking landscapes, vibrant indigenous cultures and exceptional natural heritage. Nestled within the Eastern Himalayas, one of the world’s most significant biodiversity hotspots, the state is home to an extraordinary variety of flora and fauna. Its dense forests, pristine rivers, alpine meadows and remote mountain valleys provide refuge to countless species, many of which are found nowhere else on Earth.
In recent years, Arunachal Pradesh has emerged as one of India’s most exciting frontiers for biological and ecological research, attracting scientists from across the country and around the world. From the rediscovery of species believed to have been lost for centuries to the identification of entirely new plants and animals, the state’s ecosystems continue to reveal nature’s hidden treasures.
A Living Laboratory of Biodiversity
With over 80 percent forest cover and an extraordinary range of climatic zones, Arunachal Pradesh supports an exceptional diversity of life. Its unique geography, stretching from tropical forests in the foothills to snow-clad Himalayan peaks, creates habitats for thousands of plant and animal species.
Large parts of Arunachal Pradesh remain scientifically underexplored, offering immense opportunities for new discoveries. As a result, researchers continue to uncover species previously unknown to science while also rediscovering plants and animals that had disappeared from scientific records for generations.
These discoveries not only expand scientific knowledge but also reinforce the urgent need to conserve the state’s fragile ecosystems, many of which remain among the least disturbed in the country.
The Rediscovery of Vaccinium piliferum
One of the most significant recent rediscoveries was that of Vaccinium piliferum, a rare wild relative of the blueberry.
The species was first collected in 1836 by British botanist William Griffith from the Mishmi Hills and was later documented in the Khasi Hills in 1850. For nearly 188 years, the plant remained undocumented in scientific records and was considered extremely rare.
In 2024, researchers rediscovered the species in the remote forests of Vijoynagar in Changlang district. The finding attracted attention from the global scientific community and highlighted the immense botanical wealth of Arunachal Pradesh.
Notable Discoveries and Rediscoveries
Arunachal Pradesh continues to reinforce its reputation as one of India’s foremost biodiversity hotspots through a series of remarkable discoveries and rediscoveries.
Among the most notable is Hemipilia basifoliata, a new orchid species identified in the Myodia region of Lower Dibang Valley district. The discovery added another unique species to the state’s already impressive orchid diversity. Arunachal Pradesh is home to more than 650 species of orchids, making it one of India’s richest orchid habitats.
Another remarkable botanical discovery was Gastrodia lohitensis, a rare leafless orchid discovered in Lohit district. Unlike most plants, this orchid does not perform photosynthesis. Instead, it derives nutrients through a symbiotic relationship with fungi, showcasing one of nature’s most fascinating evolutionary adaptations.
Scientists have also documented several new species belonging to plant groups such as Begonia, Impatiens and other flowering plants from different parts of the state. These discoveries continue to deepen scientific understanding of the Eastern Himalayan ecosystem.
New Discoveries in Wildlife
The wildlife of Arunachal Pradesh has proven equally fascinating for researchers.
Scientists from the Zoological Survey of India discovered three new species of cascade frogs from the state’s mountain streams:
- Amolops tawang
- Amolops chanakya
- Amolops terraorchis
These amphibians were discovered in Tawang, Dirang and the Sessa Orchid Sanctuary, highlighting the rich yet still underexplored biodiversity of Arunachal Pradesh.
In 2026, researchers discovered Euthalia zubeengargi, a new butterfly species from the Basar region of Leparada district, named in honour of renowned singer Zubeen Garg. The discovery added another unique species to the state’s growing list of butterflies.
Biodiversity surveys in Upper Siang district also recorded six butterfly species that had never before been documented in India, further underscoring the ecological significance of Arunachal Pradesh’s forests.
Researchers have continued to document new species of bush frogs, reptiles, butterflies, insects and freshwater fishes from different parts of the state. These findings reinforce the fact that Arunachal Pradesh remains one of India’s last great frontiers for wildlife exploration.
Rediscovering Nature’s Hidden Wonders
Rediscoveries hold special scientific significance because they confirm the continued survival of species once feared lost or believed to be extremely rare.
Another important rediscovery was Geum macrosepalum, a rare Himalayan flowering plant recorded near Sela Pass after more than a century since its last documented sighting in India. Such findings demonstrate the role of Arunachal Pradesh as a refuge for species that may have disappeared from other parts of their historical range.
Scientists also discovered Impatiens rajibiana, a new species of balsam flower from Shergaon in West Kameng district, further enriching the floral diversity of the Eastern Himalayas.
The state’s forests have also yielded important discoveries in the field of mycology. Researchers have documented rare and previously unrecorded mushroom and fungal species, including distinctive puffball mushrooms from Longding district. These findings contribute to a deeper understanding of forest ecosystems and their ecological health.
The Role of Indigenous Communities
The conservation of Arunachal Pradesh’s biodiversity owes much to its indigenous communities. For generations, local tribes have maintained a close relationship with nature, developing extensive knowledge of forests, wildlife, medicinal plants and ecological systems.
Traditional conservation practices and community stewardship have helped preserve vast stretches of forests and natural habitats. Many scientific expeditions continue to benefit from the support and knowledge of local communities, whose understanding of the landscape often guides researchers to rare species and previously unexplored habitats.
Why These Discoveries Matter
Scientific discoveries are far more than additions to academic literature. They provide valuable insights into ecosystem health, climate change, species evolution and conservation priorities.
Every newly discovered species—and every species rediscovered after decades or even centuries—adds another piece to the puzzle of biodiversity conservation. Together, these findings strengthen the case for protecting forests, rivers, wetlands and mountain ecosystems while informing more effective conservation and sustainable environmental management strategies.
For Arunachal Pradesh, these discoveries reaffirm the state’s position as one of India’s richest repositories of natural heritage and a globally significant centre of biodiversity.
Looking Ahead
Despite decades of scientific research, vast stretches of Arunachal Pradesh remain biologically underexplored. Scientists believe many more species, both new to science and long thought lost, are still waiting to be discovered within its forests, river valleys and high-altitude ecosystems.
The rediscovery of lost species alongside the discovery of entirely new ones serves as a powerful reminder of the state’s extraordinary natural wealth. These achievements also underscore the importance of continued research, conservation and community participation in protecting these ecosystems for future generations.
Arunachal Pradesh is far more than a destination on the map. It is a living repository of biodiversity, a sanctuary for rare and endangered species, and one of the world’s most promising frontiers for scientific exploration. As researchers continue to unlock the secrets of its forests and mountains, the state stands as a powerful reminder that conservation, indigenous stewardship and scientific curiosity must go hand in hand to preserve nature’s extraordinary legacy for generations to come.
