Some egrets stay on the bank of the Bosten Lake in northwest China's Xinjiang Uygur Autonomous Region June 13, 2004. As China's largest inland freshwater lake formed of melting snow of the Tianshan Mountain, the Bosten Lake is a paradise for water birds including egret, hern, red-billed gull and widgeon.(Xinhua photo)

Some egrets stay on the bank of the Bosten Lake in northwest China's Xinjiang Uygur Autonomous Region June 13, 2004. As China's largest inland freshwater lake formed of melting snow of the Tianshan Mountain, the Bosten Lake is a paradise for water birds including egret, hern, red-billed gull and widgeon.

A red-billed gull seeks food on the bank of the Bosten Lake in northwest China's Xinjiang Uygur Autonomous Region June 13, 2004. As China's largest inland freshwater lake formed of melting snow of the Tianshan Mountain, the Bosten Lake is a paradise for water birds including egret, hern, red-billed gull and widgeon.

Two egrets stand by the Bosten Lake in northwest China's Xinjiang Uygur Autonomous Region June 13, 2004. As China's largest inland freshwater lake formed of melting snow of the Tianshan Mountain, the Bosten Lake is a paradise for water birds including egret, hern, red-billed gull and widgeon.

A water bird seeks food on the bank of the Bosten Lake in northwest China's Xinjiang Uygur Autonomous Region June 13, 2004. As China's largest inland freshwater lake formed of melting snow of the Tianshan Mountain, the Bosten Lake is a paradise for water birds including egret, hern, red-billed gull and widgeon.

A red-billed gull dives for fish in the Bosten Lake in northwest China's Xinjiang Uygur Autonomous Region June 13, 2004. As China's largest inland freshwater lake formed of melting snow of the Tianshan Mountain, the Bosten Lake is a paradise for water birds including egret, hern, red-billed gull and widgeon. (Xinhua photo)