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A wasp for the wild: Remote village discovery reveals new natural pest enemy

A wasp for the wild: New parasitoid species named in honor of the National Geographic Society
Heinrichiellus natgeo. Credit: Dr. A.P. Ranjith

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). 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 research is in the Journal of Hymenoptera Research.

"During the Siang Expedition, we arrived in the remote village of Yingku in Arunachal Pradesh, knowing we were stepping into one of the last frontiers of in India. What we didn't know was that, tucked among the forests and farmland 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."

"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.

  • A wasp for the wild: New parasitoid species named in honor of the National Geographic Society
    Heinrichiellus natgeo. Credit: Dr. A.P. Ranjith
  • A wasp for the wild: New parasitoid species named in honor of the National Geographic Society
    Heinrichiellus natgeo. Credit: Dr. A.P. Ranjith
  • A wasp for the wild: New parasitoid species named in honor of the National Geographic Society
    Landscape view of Yingku village in Arunachal Pradesh. Credit: Sandesh Kadur/Felis Images

Despite its , 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. It has no 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.

More information: A. P. Ranjith et al, 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 (2025).

Journal information: Journal of Hymenoptera Research

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