I had two owls in my front pecan tree last night. I looked them up, and I believe they were Great Horned Owls. It was about 8 p.m. and I was watching TV when I thought I heard people talking outside. As in RIGHT outside. I stuck my head out the front door, but didn't see anyone. And then I heard the "hoo hoo hoo-hooooo" right over my head. Surprised, I reached in, turned off my porch light and stepped out. At the same time, my neighbor across the street stepped out, looking up. She called, "where is it?" I said, "You could hear it too?? It's over here, in my tree." We heard more hooting... and then not one but two large owls flew out of the tree. VERY cool. I spent about 30 minutes after that reading about them online. I did my preliminary identification from my bird book which described the hooting, and the brief flash of pale grey I saw on a very large wingspan. I'm going to start looking for them at dusk. I'd heard one before, and talked with a neighbor about it, but never heard it that nearby!