The large Barred Owl, like our Great Horned Owl, is hooting, nesting, and laying eggs about now, up here. You can hear his deep "Who cooks for yoooo? Who cooks for you-all" across the frozen nighttime moon-lit marshes.
It's tough being on the bottom of the food chain. In the uplands, rodents have to deal with the Red-Tail during the day and with the Great Horned at night; in the lowlands with the Red Shouldered during the day and the Barred Owl at night.
More about Barred Owl here at CLO. Also, somebody made a Barred Owl Cam. It seems that they will use large nest boxes, but I have only seen them using old hawk or crow nests. Their range and numbers are expanding. They are the same species as Spotted Owl, since they interbreed. Different races.