Overview
Scientists from the Zoological Survey of India have discovered two new hoverfly species in West Bengal’s Gangetic Plains. Named Eristalinus sapphirinus (for its sapphire-blue colour) and Eristalinus brunettii (after a famous entomologist), these insects are important pollinators. This is the first major addition to this genus since 1923.
A Buzzing Discovery
On 4 June 2026, the Zoological Survey of India (ZSI) announced an exciting find. Researchers have discovered two new species of hoverflies from the Gangetic Plains of West Bengal. These tiny insects may look like bees, but they are actually harmless flies. They play a very important role in nature. The two new species are named Eristalinus sapphirinus and Eristalinus brunettii . This discovery adds to India’s rich biodiversity and shows that even in well-studied areas, new species are waiting to be found.
What Are Hoverflies?
Hoverflies are also called flower flies or drone flies. They belong to the order Diptera and the family Syrphidae . You can see them in gardens and fields during spring and summer. They are often mistaken for bees or wasps because of their black and yellow markings. But there is an easy way to tell them apart. Hoverflies have only one pair of wings . Bees and wasps have two pairs. Hoverflies also have a typical fly head with short antennae and large, bulbous eyes. They are usually 4 to 10 mm long.
As their name suggests, hoverflies can stay in one place in the air, hovering over flowers. Then they suddenly dart away. They do not sting. They are completely harmless to humans.
Why Are Hoverflies Important?
Hoverflies are among the most important pollinators in the world. As adults, they visit flowers to drink nectar. While doing so, they carry pollen from one flower to another. This helps plants produce fruits and seeds. Many crops depend on hoverflies for pollination.
But that is not all. Hoverfly larvae (young ones) are called “rat-tailed maggots”. They live in water, especially in ponds, ditches, and slow-moving streams. There, they feed on decaying organic matter. They break down dead plants and animals. This recycles nutrients back into the ecosystem. So hoverflies help both as adults (pollinators) and as larvae (cleaners). They are truly beneficial insects.
The Two New Species
1. Eristalinus sapphirinus
The first new species is named Eristalinus sapphirinus . The name comes from the word “sapphire”, a precious blue gemstone. This hoverfly has a striking sapphire-blue metallic colour on its body. It is very beautiful. The colour helps scientists identify it easily. This species was found in the Gangetic Plains of West Bengal.
2. Eristalinus brunettii
The second new species is named Eristalinus brunettii . It is named in honour of Enrico Adelelmo Brunetti , an entomologist who studied Indian flies (Diptera) many years ago. Brunetti made huge contributions to the study of insects in India. The researchers wanted to thank him for his work. So they gave his name to this new hoverfly.
Both species belong to the genus Eristalinus . This genus is known for its colourful and beneficial members.
Why This Discovery Matters
The last major study of the Eristalinus genus in India was done in 1923 . That is more than 100 years ago! For a whole century, no major additions were made to this group. Then these two new species were found. This shows that even after 100 years, there is still so much to learn about India’s insect life.
The discovery also highlights the importance of the Gangetic Plains as a habitat for unique species. This region is very fertile and supports a lot of farming. But it is also under pressure from development and pollution. Finding new species here reminds us to protect natural areas.
What Do These Hoverflies Do in Nature?
Like all hoverflies, the two new species will play the same roles. As adults, they will pollinate wild flowers and crops. This helps farmers grow more food. As larvae, they will live in water and eat rotting material. This keeps ponds and streams clean. So these tiny insects are actually very helpful to humans. They do not harm crops or spread diseases. They are friends of the environment.
How Were They Discovered?
Researchers from the Zoological Survey of India collected insects from the Gangetic Plains of West Bengal. They used fine nets to catch hoverflies. Then they examined them under microscopes. They looked at the colour, wing structure, and body shape. They also studied the male reproductive parts, which are very important for separating species. After careful comparison with known species, they confirmed that these two were new to science. The findings were published in a scientific journal.
A Tribute to Historical Scientists
Naming one species after Enrico Brunetti is a nice gesture. Brunetti worked in India during the early 1900s. He wrote several volumes on Indian Diptera. His work is still used by scientists today. By naming a fly after him, the researchers are connecting the past with the present. They are saying that old work is still valuable.
What Happens Next?
Now that the species are described, other scientists can study them. They will learn about their behaviour, life cycle, and preferred habitats. This knowledge can help in conservation. If these hoverflies are found only in certain areas, those areas may need protection. Also, farmers can learn to encourage hoverflies on their farms. Planting flowers that attract hoverflies can increase pollination and reduce the need for chemical pesticides.
A Small but Important Discovery
Discovering a new insect may not make big news. But every species is a piece of the puzzle of life. Hoverflies keep our ecosystems healthy. Without them, many plants would not produce seeds. Without them, organic waste would pile up. So finding two new species is good news for science and for nature.
Exam-Focused Points
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Two new hoverfly species: Eristalinus sapphirinus and Eristalinus brunettii
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Discovered by: Zoological Survey of India (ZSI)
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Location: Gangetic Plains of West Bengal
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Eristalinus sapphirinus named for: Its sapphire-blue metallic coloration
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Eristalinus brunettii named after: Entomologist Enrico Adelelmo Brunetti (honouring his work on Indian Diptera)
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Last major contribution to this genus: 1923 (over 100 years ago)
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Hoverfly order and family: Diptera, Syrphidae
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Key feature to identify hoverflies: One pair of wings (bees and wasps have two pairs)
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