Security guards from Harbin Normal University rescued two black swans after they got trapped on a frozen lake in northern China.

The video, filmed in the city of Harbin in Heilongjiang Province on November 6, shows two black swans stuck on a frozen lake and two men on a boat attempting to rescue them.

A trapped black swan can be seen managing to escape by flapping her wings repeatedly.

After around an hour, the two security guards finally broke the ice and rescued the swans from the ice.