![](http://www.ecns.cn/hd/2024/04/09/f7a96e636b3144f3ba0bbd949f322c17.jpg)
Flocks of Baikal teal ducks fly together, looking like a "bird wave" over a lake in Kangping County of Shenyang, northeast China's Liaoning Province, April 8, 2024. (Photo/VCG)
![](http://www.ecns.cn/hd/2024/04/09/6289257ab5034359ac4593c624efb8c9.jpg)
Flocks of Baikal teal ducks fly together, looking like a "bird wave" over a lake in Kangping County of Shenyang, northeast China's Liaoning Province, April 8, 2024. (Photo/VCG)
![](http://www.ecns.cn/hd/2024/04/09/25742d1954824c83957cbb4cf69627a2.jpg)
Flocks of Baikal teal ducks fly together, looking like a "bird wave" over a lake in Kangping County of Shenyang, northeast China's Liaoning Province, April 8, 2024. (Photo/VCG)