A riverine ox-bow lake and a cluster isle comprise Purbasthali Gangetic Isle Complex located on the meandering course of River Bhagirathi, bordering the district Burdwan and Nadia in West Bengal.

Greater Coucal, Wood Sandpiper, Common Greenshank, Greenshank and spotted red shank, Common Sandpiper, Small Pratincole, Gray-Headed-Lapwing, Red Wattled Lapwing, Pheasant-Tailed-Jacana, Bronze-winged-Jacana, Common coot, Osprey, Eurasian, Marsh Harrier, Little Grebe, Little Cormorant, Intermidiate Egret, Great Egret, Purple Hearon, Indian Pontheron, Spoon Bill, Black headed Ibis, Asian Open Bill, Barn Swallow, Common Moorhen, Grey Heron, Lesser Whistling Teal, Gadwall, Swinhoe’s Snipe, Red Crested Pochard, Fulvous Whistling Duck