A flock of migratory birds hover over Caohai Lake in Weining, southwest China's Guizhou Province, December 12, 2009. Visitors and photographers from all around China is attracted to the 45-sq-km lake as  is held at the water venue at 2,200 meters above the sea level that serves as a winter habitat for over 100,000 migratory birds of 200 plus specie including over 1,000 black-necked cranes. [Xinhua]
 

A flock of various species of rare migratory birds hover over Caohai Lake in Weining, southwest China's Guizhou Province, December 12, 2009. [Xinhua]