Whooper swans swim in a city wetland park in Rongcheng, east China's Shandong Province, Dec. 1, 2016. Over 1,000 whooper swans came to spend the winter time in the park each year. (Xinhua/Yang Zhili)
Whooper swans swim in a city wetland park in Rongcheng, east China's Shandong Province, Dec. 1, 2016. Over 1,000 whooper swans came to spend the winter time in the park each year. (Xinhua/Yang Zhili)
Whooper swans swim in a city wetland park in Rongcheng, east China's Shandong Province, Dec. 1, 2016. Over 1,000 whooper swans came to spend the winter time in the park each year. (Xinhua/Yang Zhili)
