The bluebirds spend the day flying back and forth bringing insects to their babies. We sat on the porch this afternoon, just 10 feet from the box with the nest. I held my breath when a male bluebird alighted in a nearby maple, insect in mouth. The bluebird hesitated, looking at us. Several minutes passed in silence. I sat motionless, practicing invisibility. Finally the bluebird flew to the box. A chorus of peeps started as soon as he landed on top. He flew away, then a minute later returned with an insect with large wings in his beak and disappeared into the hole to feed the babies. A happy moment.