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.