Last year a pair of robins built a nest on my back deck up against the house just beneath a gazebo canopy kind of thing. Eventually our cat figured out it could get at them by getting on top of the gazebo canopy. The miracle of nature/birth is beautiful and all that but it's also potentially a real hassle, I found it quite stressful and time consuming trying to safeguard these robins and their eggs/young from the cat. Long story short, robins are back and seem determined to rebuild in the exact same spot. Cat seems happy about it. Me not so much. Although I felt heartless about it I knocked down the nest mid build this time, trying to do them a favour really. They are unstoppable. I have no idea if it's the same pair of birds or its just a really sweet piece of real estate but they will instantly rebuild. So I was going to ask how many times will they do this before they find a new spot but it's probably a moot point, buy the time I finish this long winded post they've probably rebuilt and I guess I give up.