Last spring a pair of house finches made a nest at the top of the post on my front porch and raised a family. I was too slow removing the nest after they fledged, and they raised a second brood in the same nest. I suppose it could have been an entirely different pair of house finches, but that seems unlikely. After the second set of chicks left the nest, I waited to see if they'd raise a third family, but it seems like two is the limit. I then left the nest up for the rest of the summer and fall for no reason other than pure laziness.
Then we realized that a pair of Carolina wrens were using the nest as a roost during the coldest parts of winter, making me glad I didn't remove it. They'd snuggle down into the nest in the evening, taking shelter from the wind and snow. Even though I did finally remove the nest this spring (ok, maybe it fell down), the finches are back.