Ans. The swans are essential characters in the poem that represent mythical status, grace, beauty and energy. Swans at Coole park remain unchanged even after nineteen years, while the poet has grown old and fragile.
Yeats portrays these swans as a symbol of divinity that remains unmoved and immune to isolation and pain. Readers can also find a reference to Greek Mythology where swans symbolize Zeus, the creator of western knowledge and Greek civilisation, thereby indicating perfection.