I have a birdhouse on my back porch. About a month ago, I looked inside with a flashlight and there was an egg. A week or ten days ago, it hatched. Since then, the parent birds have been flying back and forth seems like 25 hours a day carrying grubs, bugs, I dunno, whatever baby birds eat. BTW, it is a chickadee or a sparrow, just one of those small, nondescript grey songbirds. The parents are very wary and stay in the distance when I am on the back porch. Today, I go on the back porch, I have a...