What was that noise? An overactive imagination? It’s after dark, but that was definitely a shriek. It didn’t really sound human, more like a bird or maybe a cat. But birds aren’t usually active at night, and this is the suburbs; there are no cats large enough for that sound. There it goes again. What IS it? Most likely, it’s a fox. While your kids may have convinced you that you know what the fox says, I assure you, until you have heard it for yourself, you have no idea what sort of sound a fox makes. Pennsylvania is home to both the Eastern Red Fox and the Gray Fox. …