Many people become alarmed or annoyed when birds start attacking their windows in spring. A bird pecking at your window is fighting what he perceives as an intruder and is simply defending his territory—he doesn't understand that it's his own reflection.

Many species of birds are known to attack their reflection. In fact, both males and females may do this, especially species that often nest close to houses, such as American Robins, Northern Cardinals, Chipping Sparrows, and Song Sparrows.

This territorial reaction may be so strong that the bird may exhaust itself or sustain mild abrasions, but it usually doesn't result in fatal injury.Here are a few tips on how to stop birds fom attacking their reflection:
  • Try covering the outside of the window with netting or fabric so the reflection is no longer visible.
  • Try drawing soap streaks across the window to break up the reflection.
  • Shine a desk lamp out through the window. This will create bright glare that helps diminish relfection
  • Cover the outside of your window with CollidEscape.