Why in news?
Entomologists have identified two previously unknown firefly species in the East Khasi Hills of Meghalaya. The species are named Diaphanes meghalayanus and D. mawlynnong. The discovery highlights the richness of northeastern India’s insect life and draws attention to the threats faced by luminous insects.
Background
Fireflies are beetles that emit light using a chemical reaction in their abdomen. The light helps them attract mates, ward off predators and communicate. India is home to dozens of species, yet many regions remain under‑studied. Scientists from the Kerala Forest Research Institute and other institutions surveyed dark, humid forests near the India–Bangladesh border. They found wingless females and glowing larvae under rocks and within the leaf litter. By analysing the insects’ morphology and light patterns, they recognised two distinct species.
Key findings
- Distinct names and habitats: Diaphanes meghalayanus was found near the famed living‑root bridges of Mawlynnong village, while D. mawlynnong was collected from higher elevations. Both species thrive in shady, humid environments.
- Unique light patterns: Female fireflies emit slower pulses of greenish light from under boulders, whereas the males flash more rapidly during flight. These differences help scientists distinguish species.
- Threats to survival: Habitat loss, pesticides and artificial lighting endanger many firefly species. A recent checklist counts over ninety species in India, but numbers are declining as wetlands and forests are cleared.
- Importance of documentation: The discovery demonstrates the need for systematic surveys in biodiversity‑rich areas. Documenting species helps prioritise conservation and raises awareness among local communities.
Significance
- Biodiversity hotspot: Meghalaya’s limestone hills harbour rare organisms adapted to unique micro‑habitats. The new fireflies show that the region still holds secrets waiting to be studied.
- Conservation awareness: Fireflies are indicators of healthy ecosystems. Protecting them requires reducing light pollution, controlling pesticide use and conserving moist forests.
- Scientific value: Fresh discoveries improve our understanding of insect evolution and behaviour. They may also inspire citizen science projects and eco‑tourism centred on night‑glow events.
Source: India Today
