Are the swans Democrats? That’s just normal behavior in that case.
the swans are royal - all swans in England belong to the Queen unless one buys a ‘swanmark’ from the Crown
https://www.atlasobscura.com/articles/why-the-queen-owns-every-swan#:~:text=By%20default%2C%20though%2C%20the%20king%20or%20queen%20owned,open%20waters%20of%20England%20belong%20to%20the%20Queen.