![](http://www.ecns.cn/hd/2021/01/05/f7a51eff35b2418fac15cd4498ea08f5.jpg)
Black-necked cranes rest at a reservoir in Lhunzhub County, Lhasa, southwest China's Tibet Autonomous Region, Jan. 3, 2021. Black-necked cranes are often seen foraging and resting in the river valleys of Lhunzhub in winter. (Xinhua/Zhang Rufeng)
![](http://www.ecns.cn/hd/2021/01/05/f0ac43f4a6b74a49bf1a564c83e6bd7e.jpg)
Black-necked cranes hover over a nature reserve in Lhunzhub County, Lhasa, southwest China's Tibet Autonomous Region, Jan. 3, 2021. Black-necked cranes are often seen foraging and resting in the river valleys of Lhunzhub in winter. (Xinhua/Zhang Rufeng)
![](http://www.ecns.cn/hd/2021/01/05/489f491e08314ad39ca4f360dc166599.jpg)
Black-necked cranes are seen at a reservoir in Lhunzhub County, Lhasa, southwest China's Tibet Autonomous Region, Jan. 3, 2021. Black-necked cranes are often seen foraging and resting in the river valleys of Lhunzhub in winter. (Xinhua/Zhang Rufeng)
![](http://www.ecns.cn/hd/2021/01/05/c5e9d831f94d4501a0ddbfbb66a9169b.jpg)
Black-necked cranes fly over a reservoir in Lhunzhub County, Lhasa, southwest China's Tibet Autonomous Region, Jan. 3, 2021. Black-necked cranes are often seen foraging and resting in the river valleys of Lhunzhub in winter. (Xinhua/Zhang Rufeng)
![](http://www.ecns.cn/hd/2021/01/05/ad1023855a9b4f5f91cd1c09029f7d77.jpg)
Black-necked cranes are seen at a reservoir in Lhunzhub County, Lhasa, southwest China's Tibet Autonomous Region, Jan. 3, 2021. Black-necked cranes are often seen foraging and resting in the river valleys of Lhunzhub in winter. (Xinhua/Sun Fei)
![](http://www.ecns.cn/hd/2021/01/05/e74cae01ccd64ff5b96bdc42b0809cae.jpg)
Black-necked cranes rest at a reservoir in Lhunzhub County, Lhasa, southwest China's Tibet Autonomous Region, Jan. 3, 2021. Black-necked cranes are often seen foraging and resting in the river valleys of Lhunzhub in winter. (Xinhua/Sun Fei)