A flying whale? This is the breathtaking "bird-wave" at the Yellow River Delta National Nature Reserve in E China's Shandong!
The reserve has strengthened protection efforts for migratory birds, serving as a crucial wintering and stopover site for them globally.
Thanks to protection efforts and improvements in the environment, the number of bird species in the reserve has risen from 187 to 374 over the past three decades, with over 6 million birds now breeding and resting here each year.
