Zhang, Beixi, Fanjuan Meng, Yat Tung, Eun-Jung Kim, Dingtuan Zheng, Jin Yang, Yongxiang Han, et al. “Winter Population Estimates and Distribution Changes of Two Common East Asian Dabbling Duck Species: Current Status and Long-Term (1990–2020) Trends”. Wildfowl (November 14, 2025): 210–237. Accessed December 16, 2025. https://tidsskrift.dk/Wildfowl/article/view/156386.