Hi Carly
Just like humans, swan pairs get into little spats at times. Usually, these minor scuffles don’t last for long. However, if something else is occurring such as a disturbance in an area, i.e. landscaping, presence of predator, etc., the swans could start acting out against each other. What is the name of the cemetary? We may be able to contact someone to check up on the swans. Thanks for your concern. The Regal Swan