A survey of dragonflies and damselflies at Delhi’s biodiversity parks indicates that low rainfall this year may have impacted their life cycles and numbers. In a week-long survey that concluded on Sunday, a total of 25 species of dragonflies and damselflies were recorded across the biodiversity parks and the Kamla Nehru Ridge. With rainfall having picked up towards the end of the week, the scientists noticed that the dragonflies began laying eggs again. The Yamuna Biodiversity Park recorded 23 species, a little less than the 25 species recorded in 2018. They are also an indicator of water quality in wetlands and water bodies since polluted water is detrimental to them.

Source: Indian Express September 26, 2022 02:47 UTC