I caught a quick glimpse of the babies today. Mama was screeching for Big Daddy so I made it really quick; I wasn't able to confirm that there is a third baby. The babies look SO different now! I am thinking that the black coloring is either bone or cartilage under the skin. It looks like the line on their eyelids has opened a bit more, I bet they will open their eyes soon! I could also see the beginnings of their wing feathers. Their down looks longer and fluffier but they are still quite naked.
4 DAYS OLD
ETA: Just saw the third egg in the nest. I have a feeling it's just not going to hatch. It just keeps moving around the nest. At this point, it would probably be best if it didn't hatch.