A smaller Screech Owl takes up residence in a Barn Owl box. Both owl species eat rodents and insects.
From Integrated Pest Management
A barn owl box up in a pine tree. A barn owl family eats thousands of rodents in a year.
A new barn owl box up in a redwood tree.
Putting a barn owl box up in a redwood tree at a vineyard.
A barn owl box up in a coast live oak tree.
From Owl, Bluebird and Bat Boxes