The Steller Jay eggs in our garage hatched while I was in Alaska. Here's a couple of pictures I took today, so they would be what? a week and a half old? The pictures are dark because I didn't want to blind them with the flash:
They are very silent considering how loud their parents are. When we go out through the garage the parents fly out to the nearest tree and squawk abrasively, but you would never guess that the babies have this potential. A book I read recently, called "Mind of the Raven", makes the point that the loudness of the babies, or lack of it, depends upon nesting conditions. Baby ravens are very loud, because their nests are in inaccessible places. I conclude that corvids who nest in places like boxes on top of garage shelves, or on porch lights, will tend to have silent babies. I wonder when they get their voices?