Neighbourhood News Desk/Avi Arya: Compared to 2017 the number of Butterfly species that are at the six biodiversity parks in Delhi has surprising increased this year, this is now considered the second year that the Big Butterfly Count is being carried out in the capital.
Places where the Butterflies are counted is part of an event that is organized by the Bombay Natural History Society (BNHS) included Jawaharlal Nehru University, Sanjay Van, Aravalli Park in Gurgaon and the Okhla Bird Sanctuary.
According to the experts, butterfly species are rising in biodiversity parks but their numbers are dwindling in other parts of the city. Host plants based on quality are considered an important factor behind the rise in butterfly species. Individual Butterflies feeding on poor-quality plants result in their numbers growing smaller with lower reproductive potential.
Faiyaz Khudsar, lead scientist, Biodiversity Parks Programme said, “Compared to last year, we have seen an increase in the number of butterfly species in all the biodiversity parks of Delhi. The maximum number of species was recorded from the Aravalli Biodiversity Park, followed by the Yamuna Biodiversity Park and Tughlaqabad”. He also said, “The primary reasons are fragmentation of habitats and manicured gardens. These gardens lack the host plants, mostly weeds, which attract butterflies. Another reason is the heat island effect which affects their reproductive system”.