Amendment to Last Bluebird Post

My hypothesis about a one-egg clutch has been proven false. Aren't they cute? When one of the parents comes near, they all open their mouths and crane their necks. But the parents don't feed them. Instead they hop to the feeder and show them what to do. I hope they're also learning to get worms from the earth. I don't think sunflower seeds are supposed to be their primary diet. dkm