We saw a new bird at the feeder this morning! Our best guest is that it was an immature Yellow-rumped Warbler. It was the myrtle form of the species, and it looked a little like the pine warbler we saw a little while ago. What was so amzing is how yellow the little rump was. We read that it is sometimes called a butter-butt! Unfortunately, we did not get a picture of this one. Maybe he'll come back soon and we'll have the camera.