Pairs of wild mandarin ducks play in the water at Qinglilang River National Wetland Park in Xiangyang City, central China's Hubei Province, Dec. 4, 2021. (Photo: China News Service/Wang Zhuang)

A pair of wild mandarin ducks swim in the water at Qinglilang River National Wetland Park in Xiangyang City, central China's Hubei Province, Dec. 4, 2021. (Photo: China News Service/Wang Zhuang)

Wild mandarin ducks and farm-raised ducks share food provided by villagers at Qinglilang River National Wetland Park in Xiangyang City, central China's Hubei Province, Dec. 4, 2021. (Photo: China News Service/Xiong Mingyin)

Wild mandarin ducks are seen playing in the water at Qinglilang River National Wetland Park in Xiangyang City, central China's Hubei Province, Dec. 4, 2021. (Photo: China News Service/ Xiong Mingyin)

A group of wild mandarin ducks plays at Qinglilang River National Wetland Park in Xiangyang City, central China's Hubei Province, Dec. 4, 2021. (Photo: China News Service/Wang Zhuang)

Wild mandarin ducks and farm-raised ducks live in harmony at Qinglilang River National Wetland Park in Xiangyang City, central China's Hubei Province, Dec. 4, 2021. (Photo: China News Service/ Xiong Mingyin)