Relic gulls flying in national wetland park in China's Hebei

Photo taken on July 26, 2019 shows relic gulls (larus relictus) flying in a national wetland park in Kangbao County of central China's Hebei Province. Every year, over 7,000 relic gulls, which is under first-class state protection, fly here to live and multiply. (Xinhua/Yang Shiyao)