Beijing, March 5 (Youth.cn) - On March 3, 2025, members of the Beijing Leopard Wildlife Conservation Station observed tens of thousands of migratory birds gathering at Guanting Reservoir. March 3, 2025, marked the 12th World Wildlife Day, with this year’s theme being “Wildlife Conservation Finance: Investing in People and Planet.” As flocks of Whooper swans and Tundra swans arrived, the reservoir is transforming into “Swan Lake.” Photo/CFP