Relict gulls (Larus relictus) fly above the Hongjianzhuo Lake in Shenmu County of Yunlin City, northwest China's Shaanxi Province, June 24, 2011. The Hongjianzhuo Lake is also dubbed "hometown of relict gulls" given that around 10,000 relict gulls, or 90 percent of the endangered specie's population all around the world, inhabit here from May to October every year. [Photo/Xinhua]