The wetland at the Assan Barrage is situated near the confluence of the two perennial rivers, Assan and Yamuna. The Assan Barrage is a popular bird sanctuary and the lake at Assan Barrage attracts a large number of Waterfowls, which include both Waders and Divers. The birds which are listed as globally threatened species, have been observed in large numbers at Assan Barrage in Uttarakhand. In order to watch a Mallard or a Red Crested Pochard, one can swim a few hundred yards easily in the wilderness, which indeed is a memorable experience.
The Assan Barrage in Uttarakhand serves as a winter passage halt for the trans-Himalayan migratory birds. These birds are spotted here on their way to southern India, during October and November and again on their way back during late February and March.
By the end of October, the Assan Barrage in Uttarakhand witnesses the arrival of migratory birds from pale Arctic region. The first of the types to arrive is the Shoveller, followed by Ruddy Shelduck, Mallard, Cormorant, Coot, Wagtails, Egrets, Pond Heron, etc. Birds of prey can also be found in the bird sanctuary of Assan Barrage in Uttarakhand. Birds like Pallas Fishing Eagle, Greater Spotted Eagle, Marsh Harrier, Steppe Eagle and Osprey are some of them.
