Possible Clues:

• ''--- and the Swan'' (Yeats)
• She was seduced by Zeus disguised as a swan
• Leonardo da Vinci's '___ and the Swan'
• Gave birth to Castor and Pollux. That's what she got for swanning around with a god
• Swan's mate, in myth
• Bird lover died in the field
• Woman with a swan
• Aswan mate?
• Helen of Troy's mom
• Pollux's mom