Elishia Stevenson was walking in Cornwall's Coronation Park, in Helston, with her mother, father and grandparents when the vicious bird bit her on the finger.
Rachael Stevenson told her daughter the swan was technically owned by the queen as they were in a royal park and Elishia decided to write to the monarch about the 'naughty' bird.
Rachael said: 'Elishia came back in tears. There were about six swans she was feeding and one just pecked out. 'I think she was a bit shocked, but once she calmed down she asked me who owned the swans because she wanted to ask them to tell the swans off for being naughty. I told her the queen looked after them and she announced she wanted to send the letter. 'To be quite honest we posted it to keep her happy and we told her that people would tell the queen. 'In the letter, she said the swans had been naughty and that she was very upset with them. We were under no illusion that we would get a reply. We addressed it to The Queen, Buckingham Palace and that was it.' However, the queen was so touched by the six-year-old's letter that she sent an official letter of apology in return, which is now displayed on Elishia's bedroom wall.
The letter read: 'The queen wishes me to write and thank you for your letter which you have sent to Her Majesty. The queen thought it kind of you to write to her and was sorry to hear about the swan.' Rachael added: 'I hope this story brings a smile to others.'