Sundarban is the last remaining largest mangrove forest of the world with rich ecosystem and immense diversity, spread over 10,200 sqm. across the delta of the river Ganges, Brahmaputra and Meghna on the Bay of Bengal. The mangrove ecosystem of Sundarban is the home to diverse types of aquuuuuuand terrestrial plants and animals. Butterflies being important part in the foold chain act as a source of food for various predators and an important media of plangt pollination. In the recent years butterflies are considered as a focal species for biodiversity coservation in different parts of the world.