This photo taken on July 1, 2021 shows waterfowls at the Bird Island wetland at Qinghai Lake in northwest China's Qinghai Province. Qinghai Lake, located in northwest China's Qinghai Province, is China's largest inland saltwater lake. It is a major transit point for migratory birds from Central Asia to India and East Asia to Australia. It also serves as an important winter home for waterbirds on the Qinghai-Tibet Plateau.(Photo: Xinhua)
This photo taken on June 2, 2020 shows bar-headed geese at the Bird Island wetland at Qinghai Lake in northwest China's Qinghai Province. Qinghai Lake, located in northwest China's Qinghai Province, is China's largest inland saltwater lake. It is a major transit point for migratory birds from Central Asia to India and East Asia to Australia. It also serves as an important winter home for waterbirds on the Qinghai-Tibet Plateau.(Photo: Xinhua)
This aerial photo taken on July 17, 2020 shows a view of the Bird Island wetland at Qinghai Lake in northwest China's Qinghai Province. Qinghai Lake, located in northwest China's Qinghai Province, is China's largest inland saltwater lake. It is a major transit point for migratory birds from Central Asia to India and East Asia to Australia. It also serves as an important winter home for waterbirds on the Qinghai-Tibet Plateau.(Photo: Xinhua)
This photo taken on April 8, 2020 shows a brown-headed gull resting at Qinghai Lake, Gangcha County of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province. Qinghai Lake, located in northwest China's Qinghai Province, is China's largest inland saltwater lake. It is a major transit point for migratory birds from Central Asia to India and East Asia to Australia. It also serves as an important winter home for waterbirds on the Qinghai-Tibet Plateau.(Photo: Xinhua)