Bioindicator species serve as early warning systems for ecosystem degradation. Using the example of Odonata in the Western Ghats, elaborate on this concept and its implications for India's obligations under the Kunming-Montreal Global Biodiversity Framework.

Bioindicators are organisms whose presence, absence or abundance reflects the health of an ecosystem before degradation becomes visible in larger fauna. The order Odonata — dragonflies (Anisoptera) and damselflies (Zygoptera) — is a classic freshwater bioindicator, and recent evidence from the Western Ghats shows why such signals demand policy attention.

How bioindicators give early warning

• Life-cycle sensitivity: odonate larvae are aquatic and adults riparian, so the group registers pollution, siltation and flow alteration at the larval stage, well before fish or bird declines appear [1].
• Narrow niches: endemic, stream-specialist species disappear first, making local extinctions a leading indicator of habitat loss [1].
• Diagnostic use: species-composition shifts feed into water-quality assessment and Environmental Impact Assessment, converting biology into an administrative trigger [2].

The Western Ghats signal

• A 2021–2023 survey of 144 sites across five states recorded 143 species (76 dragonflies, 67 damselflies) — only about 65% of the ~220 historically known, a ~35% shortfall [1].
• 40 endemic species were recorded, Kerala accounting for the largest share, confirming the Ghats as a global endemism centre [1].
• Drivers flagged include habitat loss, pollution, hydropower and land-use change — pressures the Ecologically Sensitive Area framework under the Environment (Protection) Act, 1986 seeks to regulate but remains unnotified amid state resistance [3].
• Most species remain "Data Deficient" or unassessed on the IUCN Red List — a monitoring failure, not evidence of safety [2].

Implications for KMGBF obligations

• Target 3 (30×30) requires ecologically representative protection; invertebrate data gaps weaken site-selection credibility [4].
• Targets 2 and 21 on restoration and best-available data make systematic invertebrate monitoring a treaty commitment, not academic luxury [4].
• Credible National Biodiversity Strategy and Action Plan reporting depends on such baselines.

Odonata thus function as a freshwater dashboard for the Ghats. Institutionalising a ZSI-anchored national odonate monitoring network, integrating citizen science, and finalising the ESA notification would convert an early warning into timely action — aligning India's constitutional duty under Article 48A with its 2030 biodiversity pledges.