XINING, April 30, 2014 - Sun Jianqing (L), a staff member of the Qinghai Lake National Nature Reserve Bureau, and his colleague observe the quantity of cormorants on the Bird Island of Qinghai Lake in northwest China's Qinghai Province, April 29, 2014. The Qinghai Lake, China's largest inland salt water lake, is a habitat for over 400,000 birds every year. Video monitoring system and database platforms were established here for relevant research work.

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Zhang Hu, a staff member of the Qinghai Lake National Nature Reserve Bureau, checks the monitor on the Cormorant Island of Qinghai Lake in northwest China's Qinghai Province, April 29, 2014.

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A brown-headed gull flies over the Cormorant Island of Qinghai Lake in northwest China's Qinghai Province, April 29, 2014.

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