The Silent Witnesses: What the Missing Dragonflies of the Western Ghats Tell Us About India’s Water Future

Article Glossary

• Bio-indicators: Organisms (like dragonflies) whose health and presence reflect the overall health of an ecosystem.
• Odonata: The scientific order comprising dragonflies and damselflies.
• Living Spine: A common name for the Western Ghats, reflecting their role in regulating India's monsoon and biodiversity.
• Extirpation: Local extinction of a species from a specific geographic area, even if it survives elsewhere.
• Freshwater Stress: The depletion or degradation of water quality and quantity, critical for aquatic life.

While the nation’s attention is fixed on the digital reach of the taxman and the political theater in Tamil Nadu, a far more critical "census" has just been released from the ridges of the Western Ghats. A comprehensive two-year survey has revealed that approximately 35% of historically recorded dragonfly and damselfly species have vanished from their known habitats across India’s "living spine."

This is not a story about missing insects; it is the forensic evidence of a freshwater system in the early stages of collapse.

The Odonata Alarm

Dragonflies and damselflies (Odonata) are the undisputed apex predators of the freshwater world. Their lifecycle requires high-quality, unpolluted water, making them the ultimate bio-indicators. When 35% of these species go missing, they are effectively serving as the "canary in the coal mine" for the rivers and streams that feed South India.

The survey, which revisited sites documented over the last century, indicates that the decline is most pronounced in mid-elevation streams—precisely where human intervention through tourism, plantation expansion, and small-scale damming is most intense.

Analysis: The Silent Collapse of the Food Web

The BharatLens editorial board deduces that this extirpation points to a "trophic cascade" in the making. In the larval stage, dragonflies are the primary regulators of mosquito populations and other aquatic pests. Their disappearance suggests a shift in the chemical and thermal profile of our freshwater bodies—likely due to a combination of agricultural runoff and the rising "heat signature" of the Ghats.

The deduction is stark: We are losing the natural controllers of disease vectors. As dragonflies vanish, we can expect a corresponding, albeit delayed, rise in water-borne and vector-borne health challenges in the plains below. The Western Ghats are not just a "park"; they are the regulator of the biological equilibrium of the peninsula.

Beyond the "Green" Optics

The decline highlights a fundamental flaw in India’s environmental measurement: we focus on "forest cover" (quantity) while ignoring "indicator health" (quality). A forest can appear green on a satellite map while its streams have become biological deserts.

The missing 35% are the first witnesses to a drying Ghats. If the Odonata are failing to reproduce, it implies that the fundamental "monsoon sponge" effect of the Ghats is being compromised.

The Path Forward: Inquiry over Industry

This discovery demands a shift from passive conservation to active scientific inquiry. We need "Freshwater Sanctuaries" that prioritize the thermal and chemical integrity of streams over the aesthetic value of the forest canopy.

Science-based governance requires us to listen to the silent witnesses. If the dragonflies are leaving the Western Ghats, the water—and the stability it brings to millions—may not be far behind.

Sources and Citations

• India Today Science: "SOS from Western Ghats: India’s living spine is cracking." Link
• Scientific Reports (2026): Comprehensive survey data on Odonata (dragonfly) decline in the Western Ghats. Link
• Ministry of Environment, Forest and Climate Change (MoEFCC): Habitat monitoring reports and freshwater ecosystem stress indicators (2025-26). Link