A swan song is a person's last work or act before death or retirement. I'm not sure why a large white water bird of the genus Cygnus should be associated with that, or with a form of diving, but it is.
Did you know that swan can also refer to a poet? And can you guess who has been referred to as the swan of Avon?
If you'd like to read the first three chapters of my novel, Paint Me a Picture, you can do so here. (Er ... swans are good subjects for paintings, which is the closest I can get to making that relevant.)
Would a prize of £30,000* encourage you to swan about a bit more? If so, you might like to enter this short story competition.
*that's plenty to buy five gold rings, though perhaps insufficient to get a lord leaping with excitement ;-)