Dibru-Saikhowa National Park is situated on the south bank of the river Brahmaputra in the extreme east of Assam near Tinsukia and is also a biosphere reserve. The topography of the national park is filled with semi-evergreen, deciduous, littoral, swamp forests and patches of wet evergreen forests. The national park is mostly famous for its huge population of the majestic feral horses. Along with the feral horses, the national park is also home to about 36 species of mammals, above 400 species of birds and has a rich population of fishes. Some of the 36 species of mammals of the park include Tiger, Elephant, leopard, Jungle Cat, Rhesus Macaque, Assamese Macaque, Gangetic Dolphin, Hoolock Gibbon etc. The avifauna include Open Bill Stock, Great Pied Hornbill, Greater Spotted Eagle, White Winged Wood Duck, Pale Capped Pigeon, etc.