Recently, a ton of House Finches have taken residence on my front porch. They fly around under the roof of it and often sit on top of the chairs. But, I noticed something that worried me. They started to build a nest on the inside of a wreath that hangs on the front door. But, the wreath isn't very thick, so the nest may eventually topple off and possibly the eggs will also fall out. Is this fine, or is there something I should do about it? Also, they attack my dad's car mirror. Like, so much that they perch on it while we drive away and don't get off until they try and attack their reflection.