Went out today, and the nest is clean. Has it been two weeks already? The last few times I checked, I could see the white stripes of wren cheek-bars in the relative gloom of the nest--presumably meaning that they were fledging already--and today they're gone. They're in such a dim area--inside a nest, inside a box, back of a shelf, shaded by the house--that I was never able to get any photos that weren't a dark blur, unless I wanted to disturb them by hauling the nest around, which of course, I didn't. But there were two babies that made it, and I guess they're probably out hopping around, being herded in short flights by their parents.
I realize that Carolina wrens will nest literally anywhere, but I still feel kinda privileged to have hosted 'em. If they survive the appalling mortality rate of young birds, hopefully they'll come back next year and have some suet.