![A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise\'s Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/05/30/546efb44819741a29b32856b9d70152b.jpg)
A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise's Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)
![A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise\'s Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/05/30/1d82745a5a614d47bb1292c174e9bf3d.jpg)
A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise's Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)
![A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise\'s Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/05/30/0cc9d83a3719475c893a2c6404f1dae2.jpg)
A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise's Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)
![Swans and their cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise\'s Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/05/30/1908f5ae355742f2ab3435eeaa53f54b.jpg)
Swans and their cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise's Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)
![Swans and their cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise\'s Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/05/30/6350c736307446438617a675a4c03c8c.jpg)
Swans and their cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise's Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)
![Swans and their cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise\'s Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/05/30/c5e4478a86fc47c6aab9b97db41f372c.jpg)
Swans and their cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise's Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)
![A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise\'s Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/05/30/233a1b3c778a4fcea589da9fb7b86331.jpg)
A swan and its cygnets are seen in a nest made partly of rubbish from the lake near Queen Louise's Bridge in Copenhagen, Denmark, May 28, 2018. (Photo/Agencies)