Mallards rest on Harbin section of Songhua River in Heilongjiang

A drone photo taken on Nov. 27, 2025 shows mallards resting on the Harbin section of Songhua River in northeast China's Heilongjiang Province. (Photo by Zhang Shu/Xinhua)

An aerial drone photo taken on Nov. 27, 2025 shows mallards resting on the Harbin section of Songhua River in northeast China's Heilongjiang Province. (Photo by Zhang Shu/Xinhua)

A drone photo taken on Nov. 27, 2025 shows mallards resting on the Harbin section of Songhua River in northeast China's Heilongjiang Province. (Photo by Zhang Shu/Xinhua)

An aerial drone photo taken on Nov. 27, 2025 shows mallards resting on the Harbin section of Songhua River in northeast China's Heilongjiang Province. (Photo by Zhang Shu/Xinhua)

A drone photo taken on Nov. 27, 2025 shows mallards resting on the Harbin section of Songhua River in northeast China's Heilongjiang Province. (Photo by Zhang Shu/Xinhua)

A drone photo taken on Nov. 27, 2025 shows mallards resting on the Harbin section of Songhua River in northeast China's Heilongjiang Province. (Photo by Zhang Shu/Xinhua)