Why does Holden think of the ducks again?

In the novel "The Catcher in the Rye," Holden Caulfield repeatedly thinks about the ducks in Central Park's lagoon that fly south for the winter. Here are some reasons why he thinks of the ducks again and again:

Symbolism: The ducks represent Holden's own uncertain journey and his search for a place to belong. Just as the ducks migrate south for warmer weather, Holden is searching for a place where he feels comfortable and accepted.

Comfort and Nostalgia: Holden finds comfort in thinking about the ducks, as they remind him of his childhood visits to Central Park. The ducks represent a sense of stability and routine that he yearns for amidst the chaos and confusion of his life.

Mortality and Change: The migration of the ducks also symbolizes the passage of time and the inevitability of change. Holden contemplates the ducks' ability to adapt and survive in changing environments, which makes him reflect on his own challenges and fears about growing up and facing an uncertain future.

Connection to Nature: Holden finds solace in nature, and the ducks represent a connection to the natural world that he values and appreciates. In contrast to the artificial and superficial society he often criticizes, the ducks embody simplicity and authenticity.

By repeatedly thinking about the ducks, Holden grapples with themes of identity, belonging, and the complexities of growing up in a changing world.