* The ducks have "come south" for the winter.
* His room is a "pigsty."
* New York City is a "zoo."
* The subway is always a "madman."
* His teachers all seem like they could care less about him.
These are just a few examples of how personification is used in _Catcher in the Rye_. By giving human qualities to non-human objects or ideas, Salinger allows readers to better understand and relate to Holden's unique perspective on the world.