Black-necked cranes are seen before sunrise at Dahaizi Wetland at Dashanbao Black-necked Crane Nature Reserve in Zhaotong City, southwest China's Yunnan Province, Feb. 28, 2016. (Photo: Xinhua/Hu Chao)
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Black-necked cranes are seen before sunrise at Dahaizi Wetland at Dashanbao Black-necked Crane Nature Reserve in Zhaotong City, southwest China's Yunnan Province, Feb. 28, 2016. (Photo: Xinhua/Hu Chao)
