OK, you opened your front door this morning to pick up the latest edition of your local newspaper and were greeted with a face full of those awful, dirty Miller Moths who became residents of your home before the door could be slammed shut.

“Where in the world do all these things come from,” you probably asked no one in particular as you searched for the fly swatter. “Why doesn’t someone spray for them?” might be another futile question. Well, here is the answer to both those questions.

Miller Moths are the original snow birds. You know, the folks who migrate from cold northern...