The Dying Swan was a 20th century Earth ballet.
During Talent Night aboard the USS Voyager in 2373, Captain Kathryn Janeway performed The Dying Swan. She learned the dance when she was six years old. (VOY: "Coda")
The Dying Swan is a ballet danced to the music of the cello solo Le Cygne (The Swan) from Le Carnaval des Animaux (The Carnival of the Animals) composed by Camille Saint-Saëns.