From a couple of comments, from Malin and Linda, I knew that I might find a flock of whooper swans (Cygnus cygnus), close to the old tree at Välsta. And sure enough, I counted around 80 swans on the field on my visit yesterday. As I walked closer I could hear their deep honking call. And then, as I got the camera ready, I managed to scare away a flock of Canadian Geese, but I did get a decent shot of the birds as they flew away. Read more about the swans on wikipedia.
