Black-headed gulls are seen at Longwangtan park in Lhasa, southwest China's Tibet Autonomous Region, Nov. 17, 2021. [Photo by Zhang Rufeng/Xinhua]
Birds are seen at Longwangtan park in Lhasa, southwest China's Tibet Autonomous Region, Nov. 17, 2021. [Photo by Zhang Rufeng/Xinhua]
Black-headed gulls are seen at Longwangtan park in Lhasa, southwest China's Tibet Autonomous Region, Nov. 17, 2021. [Photo by Zhang Rufeng/Xinhua]
Ruddy shelduck are seen at Longwangtan park in Lhasa, southwest China's Tibet Autonomous Region, Nov. 17, 2021. [Photo by Zhang Rufeng/Xinhua]
Bar-headed geese fly over Longwangtan park in Lhasa, southwest China's Tibet Autonomous Region, Nov. 17, 2021. [Photo by Zhang Rufeng/Xinhua]