I had heard and seen pictures of trumpeter swans wintering along the shore near town, but had not seen them until yesterday. A pair of them flew a few circles around the Sheldon Jackson quad in the afternoon when I was walking home. I am not sure why they were doing that, but I could distinctly hear a rhythmic buzzing sound that pulsed in time with the flapping of their wings. I’m not sure if the noise was created by their feathers or if it was a vocalization of some sort.