March 1 2014 Mute swans negotiating territorial borders. Here in a wet snowing weather while being on the west side of the lake these swans were seen doing some swan conversation about their territorial borders. The right couple seems to be the B swans (their ring have a B in the number), where the male swan is called the alpha one, several stories about his chasing adventures are told by people visiting the lake. The fourth of the swans to the left behind some small island. The B swans usually have their nest a bit more south. At lake Østensjøvannet nature reserve March 1 2014. Hero3.