I watched on rewind - what a great feature! - and came away with a couple of thoughts. One, that was a bonded pair play-working on N2B. The smaller one with the dirty beak tip was DM2, which I could tell by his white collar. He has an extra long patch of white collar feathers on the left side. Their familiarity, ease with each other and hanky-panky on the skywalk lead me to think the larger bird was Mom. A stunningly beautiful Mom, I have to say. I couldn't really see her grey eyeshadow, which is probably because of the light. It would also be just like Mom to leave her first egg uncovered, anticipating a second egg, at least. That's about as far as I can go after musing on the confusion couch.
