The park offers a variety of experiences in its vast undisturbed wilderness. About 70% of the forest consists of Sal trees with a mixture of grassland and riverine forests. Sal leaves are used in festival and religious offering. The park is home to endangered animals such as the Royal Bengal tiger, wild elephant, Greater one-horned rhinoceros, swamp deer, and black buck.  The other endangered species include gharial-crocodile, marsh mugger and Gangetic dolphin. Endangered birds found in the park are Bengal florican, lesser florican and sarus crane, More than 30 different mammals, over 230 species of birds and several species of snakes, lizard and fish have been recorded in the park's forest, grassland and river. In addition to the resident species, several migratory birds visit the park.