Dead parakeet after hitting a window. For birds, glass windows are worse than invisible, by reflecting foliage or sky, they look like inviting places to fly into. Sadly, the bird often dies, even when it is only temporarily stunned and manages to fly away. Many times these birds die later from internal bleeding or bruising, especially on the brain. There?s one additional reason: birds sometimes see their reflection in a window and attack it. This happens most frequently in the spring when territoriality is high. Note leg band. It's probably a bird that escaped from a birdcage. Portugal