Swhat does the Central Park in Catcher in the Rye represent?

Central Park is central to Holden's problems. He wonders where the ducks go in the winter. The taxi cab driver tells him he doesn't know then ignores him. It is all part of Holden's drive to save people, catching them coming through the rye. Central Park, on the whole, is part of NYC, and NYC is shown to not be what Holden expects; it's just as phony as his prep school. The wildlife, on the other hand, allows us to access Holden's thoughts on mortality. The ducks, in particular, allow him to reflect on death, one of his major preoccupations throughout the novel. Take a look at the link for more info.