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Swans nest by the rivers at the Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. A total of 140 swans were found at Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. An investigation into the species, geo-location and so on was jointly conducted by staffs of nature reserve and Lanzhou University, in order to better protect these migrant birds.（Photo: China News Service/Zhang Xiqing）
Swans nest by the rivers at the Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. A total of 140 swans were found at Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. An investigation into the species, geo-location and so on was jointly conducted by staffs of nature reserve and Lanzhou University, in order to better protect these migrant birds.（Photo: China News Service/Zhang Xiqing）
Swans nest by the rivers at the Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. A total of 140 swans were found at Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. An investigation into the species, geo-location and so on was jointly conducted by staffs of nature reserve and Lanzhou University, in order to better protect these migrant birds.（Photo: China News Service/Zhang Xiqing）
Swans nest by the rivers at the Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. A total of 140 swans were found at Heihe Wetlands National Nature Reserve in Zhangye City, NW China’s Gansu Province, Jan. 6 to 7. An investigation into the species, geo-location and so on was jointly conducted by staffs of nature reserve and Lanzhou University, in order to better protect these migrant birds. （Photo: China News Service/Zhang Xiqing）
