Recent online pictures show birds flock at the Napahai Lake in Shangri-La, Diqing Tibetan Autonomous Prefecture, where the 4th Shangri-La International Bird Watching Festival is going on.

Besides the black-necked cranes, the Napahai nature reserve in winter also makes home to other birds such as red ducks, bar-headed geese, white-tailed sea eagles, and black storks.

Reporting by Zhang Bin; trans-editing by Wang Shixue