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Dragonfly Survey – Delhi biodiversity parks
Introduction
A three-day survey has begun across seven biodiversity parks in Delhi to study the population of dragonflies and damselflies. Conducted annually, the survey helps monitor the health of wetlands and ecosystems. Dragonflies, which feed on mosquitoes and other pests, are vital indicators of environmental balance and public health.
Basics
What are dragonflies and damselflies?
They are insects dependent on wetlands and perennial water bodies for breeding and survival.
Why are they important?
They act as predators feeding on mosquitoes, flies, and other pests, thereby controlling vector-borne diseases like dengue.
What does the survey involve?
Students and experts count different species, check habitats, and monitor their presence across Delhi’s biodiversity parks.
What are the threats?
Habitat loss due to urbanisation, pollution, invasive species, and climate change has reduced their numbers worldwide.
What does the global data show?
According to the IUCN, 16% of dragonfly species are at risk of extinction due to rapid wetland degradation.
Significance
The restoration of Kamla Nehru Ridge has shown how ecological revival can increase dragonfly numbers by improving water bodies, restoring natural drainage, and creating shaded pools. This highlights the link between conservation and healthier urban ecosystems.