* An open window or door: If a classroom window or door is left open, it creates an opportunity for birds to enter. Birds may be attracted to the light or the sounds coming from the classroom.
* Food or other attractants: If a classroom has food or other attractants, such as plants or water, it can attract birds from the outside.
* Stress or disorientation: Sometimes, birds can become stressed or disoriented, causing them to fly into buildings. This can happen during storms or other weather events, or if the bird is injured or sick.
* Accidental entry: In rare cases, birds may simply fly into classrooms by accident, especially during migration.