Complex sentence: The eastern population winters on the Yangtze River and Lake Poyang in China, and the western population in Fereydoon Kenar in Iran and Keoladeo National Park, India.
Split into simpler sentences: The eastern population winters on the Yangtze River and Lake Poyang in China. The west and the western population in Fereydoon Kenar in Iran and Keoladeo National Park, India.