Why did claude debussy compose the swan?

The famous piece "The Swan" is by Camille Saint-Saens, from his suite for chamber ensemble "Carnival of The Animals." "The Swan" was originally scored for two pianos accompanying a solo cello. There are listings on the web for "The Swan" by Debussy, but they all turn out to be the Saint-Saens piece.
The famous piece "The Swan" is by Camille Saint-Saens, from his suite for chamber ensemble "Carnival of The Animals." "The Swan" was originally scored for two pianos accompanying a solo cello. There are listings on the web for "The Swan" by Debussy, but they all turn out to be the Saint-Saens piece.