Whooper swans swim at Qinghai Lake near Xining, capital of northwest China's Qinghai Province October 6, 2009. Whooper swans arrived at the lake to live through the winter weeks earlier than past years. [Xinhua]

Whooper swans swim at Qinghai Lake near Xining, capital of northwest China's Qinghai Province October 6, 2009. [Xinhua]