Brown-headed seagulls seen in Thailand

Tourists watch brown-headed seagulls at a seaside recreation area in Bang Pu, central Thailand's Samut Prakan Province, Nov. 20, 2017. The shores of the Gulf of Thailand serve as a major wintering site for flocks of brown-headed gulls that migrate southwards between mid-October and the end of April. (Xinhua/Rachen Sageamsak)