Every year my little friend and her mate come to my window and attempt to build a nest on the narrow brick ledge. They bring sprigs of grasses etc and lay them down and then the wind on this third floor blows it all away. Eventually they give up and move on to another location. I wish I could build a little ledge for them but you know how Condo's have rules so that is out of the question. I love these sweet little doves!