Wullar Lake is considered to be the largest fresh water lake in India, which also serves as a natural reservoir in the region. This lake draws water from Jhelum River and is home to different species of birds. Situated amidst this lake are the remains of an island built by the king Zain-ul-abidin that attracts number of travellers.Some of the important streams like Erin, Aarah, Harbuji and Pohru flow into this lake. It is situated near the famous Nal Sarovar Bird Sanctuary and can be visited between the months of April and June. The size of this lake varies from 30 sq. km to 260 sq. km, according to the change in season. It was previously known as Mahapadma Sar and is home to various fish species.The important fish species in this lake are rosy barb, common carp and mosquito fish. Terrestrial birds like short-toed eagle, blue rock pigeon, golden oriole, alpine swift and sparrow hawk can also.