I caught these photos of a Chipping Sparrow raising her Cowbird "offspring", who is already twice her size! The baby was making the unmistakable "Feed Me" sound until she placed a husked sunflower seed into it's mouth. Repeat. Mom flew off a couple of times, leaving the baby on his own. He would peck and find some of his own seeds, but would run after whatever other kind of bird was nearby and squeal "Feed Me!" at them (they ignored him). Mom always came back after a short rest break.