Young Barn Swallows make it easy for parents to 'hit the target' in feeding them as they open their beaks wide when any adult swallow comes near. The parents (both parents feed fledglings) will feed them from 2 to 7 days after they fledge from the nest and they have to make many trips to fill these hungry young birds' bellies. So the parent bird is off again to find some delectable insect for it's young.SeEtta