Mergansers search for food on the wetland in Qinhuangdao, a coastal city in north China's Hebei Province, Dec. 26, 2009. A flock of mallards fly to the coastal wetland that has not froze over.

A red-breasted merganser stretches its wings on the wetland in Qinhuangdao, a coastal city in north China's Hebei Province, Dec. 30, 2009. A flock of mallards fly to the coastal wetland that has not froze over.