I woke up this morning to a moth covered porch. All of these moths were surrounded by little things that looked like broken spaghetti pieces. Not sure if they are larve or what. I saw these at a friends house several years ago swarming around their outdoor light. Thousands of them. I can't remember what he said they were but I do remember him saying that they only come out every 7 years or so to mate and die.. Any ideas as to what they are? Thanks!