Topography & Climate
The topography of the sanctuary is almost flat with an average height of 100mtrs above mean sea level. The area gently slopes from North – West to South –East. The sanctuary, drained by great Gandak, the little Gandak, Pyas and Rohin rivers, has a number of ponds, lakes [Tals], swamps and open grass lands. Climate of the area is pleasant throughout the year, with moderately chilly winters, during December & January.
Fauna
Such a varied area is inhabited by a variety of animals which mainly includes Leopard, Tiger, Jungle Cat, Small Indian Civet, Langur, Deer, Blue Bull, Wild boar, Porcupine etc.
The Avifauna is varied with Little Cormorant, Snake Bird, Brahimini Duck, Common Teal, Little Egret, Cattle Egret, Paddy Bird, Pintail, White Ibis, Black Ibis, Spoon Bill, Grey Partridge, Swamp Partridge, Red Jungle Fowl, Blue Rock Pigeon Spotted Dove, Pea fowl, Indian Pied Hornbill, Tree Pie, Little Green Bee-eater, Pond Heron, Red-vented Blue Bul, Golden backed Wood pecker, Pied King Fisher, Blue King Fisher etc.
The Reptilians are represented by the Python Tortoise, Crocodile, Common Cobra, Common Krait, Rat Snake etc.