I was taking a walk along the River Itchen in Winchester and there were some swans swimming up the river towards me. One was swimming along quite normally but a second was following it and was swimming in a strange way. It had its head low to the water and was swimming in a surging motion rather than the regular paddling. I don’t know whether this was some sort of mating action or just a weird swan! Video seemed to be the best way to record this.