Sundarbans extends across the Bay of Bengal, which is one of the natural wonders of the world, situated in the delta region of the Padma, Meghna and Brahmaputra rivers in the delta region, spread across Khulna, Satkhira, Bagerhat, Patuakhali and Barguna districts. As the largest mangrove forest in the coastal environment, the Sundarbans is the world's largest integrated forest. In Bangladesh, there are 6,017 sq km of the Sundarbans that comprise 10,000 sq km. Sundarbans was recognized as UNESCO World Heritage Site in 1997.
Recent studies have shown that the diverse biodiversity reservoirs are commercially important in the Sundarbans commercially important 120 species of fish, 270 species of birds, 42 species of mammals, 35 reptiles and 8 amphibian habitats. From this it is understood that there are a large number of species of different species (30% reptiles, 37% of birds and 37% mammals) in the Sundarbans of Bangladesh, and a large part of them is rare in other parts of the country. For birds in the field of observation, reading and research, the Sundarbans is a paradise for birds.