Our Screech Owl house has a 4 inch diameter opening, which also means it works great for Kestrel and Flickers. It is easy to open, with a twist style lock on the front, for easy cleaning when the brood leaves the nest.
This Screech Owl House is made using red cedar and built in the USA. To best attract screech owl, put the box at least 15-20 feet high in a tree, away from most human activity. Place the house just below a branch, so the screech owls can perch just above the opening to the house. Screech owls can begin nesting in January, so it makes a great fall project. If you encounter squirrels getting into the houses, either let them nest there, until January or place something over the hole until January, when the screech owls will begin nesting.