Stellaluna is about a young bat named Stellaluna who gets separated from her mother and ends up in a bird's nest. She is raised by the bird family but struggles to fit in as she cannot do things like birds due to being a bat. The story explores how both Stellaluna and the birds learn about their differences but eventually become friends. The character of Stellaluna allows readers who have felt like an outsider, such as moving to a new school, to relate to her experience of not fitting in at first but eventually making friends.