As autumn progresses in the upper Midwest, birds appear and disappear, group and spread out. Pileated woodpeckers have returned to the suet feeders. Chickens help grind up the garden residue and eat the bugs. White-throated sparrows sing a different tune on their way south. Juncos suddenly appear. Bluebirds sit on branches surveying the yards. Hawks send everyone scurrying. Vultures wing one more time overhead before catching the north winds and head to warmer climes.