Hi, My name is Lisa and I live in Southern California. Over the last week, I have had the amazing pleasure of watching two doves build their nest right outside my front door on the porch column. I can see them from the front door window. I have been checking on them several times a day. They completed their nest two days ago. They have stayed through visitors coming and going as well as Amazon packages being left on my front door. This morning I saw one dove sitting in the nest and the other dove picking up a twig from the ground. I walked away and then checked on them again 15 minutes later. The nest was gone and nowhere to be found and one cracked egg was on the ground. I was so disheartened. Does anybody know what could have happened? It seems strange that there is no sign of the nest.