Last Year I had this crazy robin at my work that would show up on a branch outside my office at the same time every day and for about an hour, some times more, he would fly at the window and back to the branch. I thought this a little wired and no one at work knew why he did this. well a year later I am sitting at home, right now for that matter and I have a robin outside on my deck doing the very same thing. Dose any one know why?