[InKunming--Gallery]  Tourists feed black-headed gulls on boat at Caohai Levee of Dianchi Lake in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March. [Xinhua]

Two black-headed gulls have bread in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March.[Xinhua]

Tourists feed black-headed gulls at Caohai Levee of Dianchi Lake in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March. [Xinhua]

Tourists feed black-headed gulls at Caohai Levee of Dianchi Lake in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March. [Xinhua]

Tourists feed black-headed gulls on boat at Caohai Levee of Dianchi Lake in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March. [Xinhua]

Three black-headed gulls compete for the bread thrown by tourists at Caohai Levee of Dianchi Lake in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March. [Xinhua]

Tourists feed black-headed gulls at Caohai Levee of Dianchi Lake in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March.[Xinhua]

A boy looks at black-headed gulls at Caohai Levee of Dianchi Lake in Kunming, capital of southwest China's Yunnan Province, March 16, 2014. Most of the black-headed gulls will have left Kunming and migrated towards north by the end of March. [Xinhua]