The owl one is most likely to hear at Lonesome Valley is the Barred Owl. These owls are very territorial, and they don’t migrate. Solitary calls from a male in early spring probably mean that he has not attracted a mate. In May and June, he continues to hoot, though less frequently. By summer, breeding season has passed. Maybe this solitary Barred Owl is what some scientists call a “non-breeding floater”. Learn more about Barred Owls at Cornell's AllAboutBirds http://www.allaboutbirds.org/guide/Barred_Owl/lifehistory
You can have fun calling to the owls. Their are MP3 owl calls available, and you can call owls in close using these recorders. They have calls for both Barred and Screech Owls.Try calling from a deck. There are at least three Barred owls in the valley this winter.