A three-day butterfly survey organised by the Kerala State Biodiversity Board (KSBB) and the Forest and Wildlife Department in North Wayanad has revealed 178 species, including at least four rare species. The survey which covered portions of the North Wayanad forest division, Wayanad wildlife sanctuary and South Wayanad forest division was conducted to document the butterfly diversity of the region and understand their role as indicators of the state of the environment.
As many as 43 species of skippers, 44 species of blues, 15 species of swallow tails, 19 white and yellows and 57 species of brush-footed butterflies were recorded. The Sahyadri Banded Tail was first recorded from the region. Rare species like the Danaid egg fly, Crimson Rose and Malabar Banded Swallow Tail were sighted from Mattilayam, Periya and Kuruva island. As many as 180 people, including 40 students, from various biodiversity clubs in Wayanad district, 19 experts, six officials from KSBB and nine Forest staff participated in the survey. The expert team included Muhammed Jaffer Palot, senior scientist, Zoological Survey of India; Balakrishnan Valappil; Chandrasekharan Koyilandi; and Pavithran Vadakara.
The participants were split into 15 groups to cover different transect each day. Each group consisted of one or more experts, forest watchers and staff from KSBB. A datasheet and detailed species checklist were prepared for each transect. The photographs of all the butterflies have been filed.
K.P. Laladhas, member secretary, KSBB, said the survey was part of a study to assess the migration pattern of butterflies and use it as a tool to formulate conservation strategies.
Climate change issues
“Apart from understanding the biological behaviour of the species, the study will also help to assess how climate change influences mass migration. The findings of the survey will be linked to other data like climate parameters to draw inferences”, he said.
“In many countries, butterflies are recognised as environmental indicators for their sensitive response to habitat and climate changes,” says Oommen V. Oommen, chairman, KSBB. He said periodic surveys would be conducted to keep the data up to date.
