Son of COG spent some time observing the owls last night and he told me that the owl blob I saw wsas actually one of the parents. The baby owl was a different owl-shaped blob slightly lower in the same tree.
He had a bit of excitement when one of the parents flew right over him - close above and went to feed the Owlet. He said that he knew owls make no noise flying, but it startled him all the same that the one flying over him was completely silent. No soft whoosh of wings or anything.
I found a link online where you can hear the sound we've been hearing, just click on the option for 'Owlet calling for food.'
I love living here in the wild kingdom.