Large flocks of avocets, mallards, and other migratory birds were recently observed either foraging or flying in unison over the Poyang Lake in east China's Jiangxi Province, creating mesmerizing and undulating waves that captivated onlookers.

This breathtaking phenomenon occurs as different species of migratory birds gather and move together in synchronized formations while foraging.

As cold weather sets in, an increasing number of migratory birds flying southward have arrived at the Poyang Lake, China's largest freshwater lake.

To ensure the safety of these birds during their migration and wintering, local authorities have introduced a range of protective measures, including ground patrols, drone surveillance, and the implementation of a comprehensive bird protection monitoring system.