Just thought of another question – does having a wren guard on do more harm than good when it is this hot? In other words, since it blocks the hole’s air somewhat, would it be better to risk house wren or the heat? Which is the worse enemy, as they both basically are mother nature at work. I know there has been a wren around since it destroyed my last nest about 2 weeks ago, but I really have not seen it lately. My box does have good ventilation at the top, but geeze …….
