Black-necked cranes seen in Shannan, China's Tibet(1/5)

Photo taken on March 11, 2020 shows black-necked cranes on the northern bank of Yarlung Zangbo River in Shannan City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on March 11, 2020 shows black-necked cranes on the northern bank of Yarlung Zangbo River in Shannan City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on March 11, 2020 shows black-necked cranes on the northern bank of Yarlung Zangbo River in Shannan City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on March 11, 2020 shows black-necked cranes on the northern bank of Yarlung Zangbo River in Shannan City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on March 11, 2020 shows black-necked cranes on the northern bank of Yarlung Zangbo River in Shannan City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)