We had the pleasure of watching a family of tufted titmouse birds who took up residence in a birdhouse in our backyard last summer. We only observed one baby who already looked quite big when it first  made an appearance at the entrance to the birdhouse. The birdhouse was about 12 feet high on the tree, with the opening facing south. By the time the fledgling was ready to leave the nest, it appeared larger than the adult bird. Because this baby needed to be fed so often (about every 20 minutes), I was able to set up my tripod and camera and wait for the right moment to catch the mother feeding...