Very nice photo! It's difficult to find the usually nocturnal owls perched like some other birds (I have never seen one..., well, may be few times the Little Owl)! With the day-flying owls (like the Burrowing Owl) it's different.
We have on Hawaii the very similar Barn Owl (Tyto alba) - I still have no photo of that one, despite it's the only European Barn Owl. Your photo is of the American Barn Owl (Tyto furcata). There are 10 different "Barn Owls" in the world and totally 25 from the genus Tyto (as of 2013). Some of them hard to separate from each other.