A bevy of hover over the water area of Nanbei Harbour, an integral part of the swamp of Poyang Lake, the country's largest fresh water lake, in Hukou County, east China's Jiangxi Province, Nov. 22, 2009. An increasing number of migrant birds, among them the white crane, white spoonbill, swan goose, etc, arrive here for their winter habitat. [Xinhua]