Robin flying into front window

There is a Robin in a bush in my front yard. I would not be concerned but the Robin is constantly flying into our front window. I think it is seeing it's reflection in the window and trying to defend it's Bush. I do not see any sign if a nest yet but I am worried about the Robin flying into the window. I tried reflective tape to discourage the Robin but it keeps coming back. I then tried the decoy owl we have and the Robin came back. Last thing I tried is a wind chime but the bush is in a sheltered area and the wind chime is not moving or making any noise. What should I do?