This is a rather rare "yard bird" for me. I was standing on the front porch with #2 Son this afternoon and he was asking me what the various birds we were seeing (boldly coming to get sunflower seeds even though we were standing right there talking) and I was telling him their names - and then all of a sudden I said "Wait! Is that a brown creeper??" And it was! And it was still there when I got my camera from inside. Yay!
The photo isn't upside down. Or sideways. Creepers can be seen going up, down, right side up, or upside down. They don't care. This one, when I managed to get a clear shot of it, was going along upside down under a branch. As you do.