The finding was published in the March-June 2025 issue of the quarterly newsletter Bionotes, released by the Butterfly Research Centre, Bhimtal in Uttarakhand last month.
A rare species of butterfly, the 'Spotless Baron' (Euthalia recta), has been photographed at Dzongu in North Sikkim by noted nature conservationist Sonam Wangchuk Lepcha, marking its return after a gap of five years.