Why do birds strike/tap windows?
My father was very interested in the problem of birds striking windows and corresponded with many people and visited some problem birds, but he never got to the bottom of the problem. The standard answer is that the window is in the birds territory and when it catches sight of its reflection mistakes it for a rival. This certainly seems to be the answer to some instances but it is not always so simple. The bird can be so obsessive that it attacks every window in a house, every day. And I have seen this behaviour in non-territorial females. This makes the cure more of a problem! You can try stringing enough strands of cotton to actually keep the bird away from the panes. According to the RSPB, the only way to prevent the attacks is to cover the glass with clear, non-reflecting plastic or, less effectively, hang a curtain of plastic strips that flutter in the breeze. This is not always practicable or desirable. So my rather negative answer is to hope that the bird goes away, dies or give
