Blue Mormon butterfly - Second largest butterfly in India - Papilio polymnestor

Soumyabrata Roy

A Blue Mormon butterfly (Papilio polymnestor) is a large swallowtail species, the second largest butterfly in India, with a wingspan of 120 to 150 mm, sitting on a fiddlehead fern and other forest weed leaves at Tehatta, West Bengal, India, on April 26, 2025.