There's a thin layer of ice on top of the pond at Bradgate Park, in Glenfield, UK. But swans gotta swim, for some reason. This swan family follows dad single file as he breaks a path through the ice, bit by bit.
You may think it's more trouble than it's worth, but you are not a swan. It must be important to them. -via Tastefully Offensive
I wonder if the designer of the first icebreaker ship saw this behavior?