"During the Siang Expedition, funded by the National Geographic Society and Felis Creations, we arrived in the remote village of Yingku in Arunachal Pradesh, knowing we were stepping into one of the last frontiers of biodiversity in India. What we didn't know was that tucked among the forests and farmlands was a tiny creature that had never been formally introduced to science until now," say researchers Dr. A.P. Ranjith (Integrative Insect Ecology Research Unit, Department of Biology, Chulalongkorn University, Thailand) and Associate Professor Dr. Buntika A. Butcher (Integrative Insect Ecology Research Unit, Department of Biology, Chulalongkorn University, Thailand). "On the very first day, we collected a pair both male and female of this amazing, enchanting new species!"
Meet Heinrichiellus natgeo, a newly discovered species of parasitoid wasp. The species was described by Dr. Ranjith and Dr. Gavin R. Broad (The Natural History Museum, London, UK), under the supervision of Additionally, genetic data helped them determine the new species' systematic placement, with the assistance of Dr. Bernardo F. Santos (Center for Integrative Biodiversity Discovery, Museum für Naturkunde, Berlin, Germany).
"The name natgeo isn't a coincidence - we chose it in honor of the National Geographic Society, whose legacy of exploration, conservation, and storytelling has inspired thousands of people. This discovery is our way of saying thank you for their outstanding commitment to the environment," Dr. Butcher says.
Despite its small size, this insect plays an outsized role in keeping ecosystems balanced. It is a natural enemy of several pest species, ensuring that nature's checks and balances continue working quietly in the background.
In the field, the wasp didn't shout for attention no bright colors or loud buzzing. Instead, it was a patient hunter, seeking out the eggs or larvae of its host species. "It's a reminder that some of nature's most important work happens in complete silence," says Dr. Ranjith Even though the researchers do not yet have biological data, they assume that this remarkable species will play a significant role in the forest ecosystem by helping to regulate insect pest populations.
"And here's a fun twist in the story: we collected both the male and female specimens using a yellow pan trap a deceptively simple tool that works by tapping into parasitoid wasps' irresistible attraction to the color yellow. It's fieldwork science at its most charming: a splash of color in the forest that quietly lures in tiny wonders," Dr. Butcher says.
"Discoveries like this matter not just for the sake of science, but for the health of ecosystems and the future of conservation, particularly in the world's biodiversity hotspots," the researchers say in conclusion. "In a time when species are disappearing faster than we can document them, every new find is both a small victory for biodiversity and an encouragement for more young talents to engage in biodiversity research."
Alongside this, the researchers also uncovered two more new species, Heinrichiellus brevispinus from Thailand and Heinrichiellus vedani from South India. These exciting finds remind us that India and Thailand still hold countless hidden treasures of biodiversity, waiting to be discovered. They published their study in the Journal of Hymenoptera Research.
Research article:
Ranjith AP, Broad GR, Santos BF, Butcher BA (2025) First report of the genus Heinrichiellus Tereshkin, 2009 (Hymenoptera, Ichneumonidae) from the Oriental region with the description of three new species. Journal of Hymenoptera Research 98: 757-778. https://doi.org/10.3897/jhr.98.158760
About the Research team:
Dr. A.P. Ranjith, a post-doctoral fellow at Chulalongkorn University, Thailand, is an expert taxonomist specializing in hymenopteran parasitoids, with more than ten years of experience in taxonomy and systematics. He has described over 100 species and 11 genera new to science.
Dr. Gavin R. Broad, based at the Natural History Museum, UK, has several decades of experience in the phylogeny and systematics of ichneumonid parasitoid wasps. He has described several hundred new species and numerous new genera.
Dr. Bernardo F. Santos, from the Museum für Naturkunde, Germany, possesses extensive knowledge of the evolution and phylogeny of parasitoid wasps, with a strong background in parasitoid taxonomy.
Dr. Buntika A. Butcher, who supervised the study, is an Associate Professor at Chulalongkorn University. She is an experienced researcher with strong expertise in the taxonomy and systematics of braconid parasitoid wasps and their biology.
The team focuses primarily on documenting biodiversity in understudied countries such as India and Thailand, while raising awareness of the ecological importance of insect diversity.
