Zhi Yijin and Shao Mingqin, 2019. Population Size and Sex Ratio of Wintering Scaly-Sided Merganser Mergus squamatus in the Poyang Lake Water System, Jiangxi Province, China. Pakistan J. Zool., 51: 1067-1073. DOI: http://dx.doi.org/10.17582/journal.pjz/2019.51.3.1067.1073