I found out the original owl I saw was the father standing guard near a nest tree. Today I heard hooting as I was leaving the lake so I went back and parked and stood across from the nest tree. Soon one owl, then the other flew from behind me to a tree further back than the nest tree. I didn't want to scare her off so I stayed back. It was heavily cloudy and dark so I was not able to get a very clear picture but it was still thrilling to see them both together.
Barred Owl (Strix varia)