American Kestrel / Screech Owl HouseThis Nest box should be placed at least 10-20 feet high on a large tree near woodland clearing with unobstructed flying area to attract Screech Owls. To attract Kestrels, place the box 10-30 feet high on a tree or post at the edge of a sunny field. Use 2-3 inches of wood shavings and wood chips for nesting material. Trees isolated from larger tracts of woods have less chance of squirrels taking over the box. Side swings open for cleaning. Measures: 12 1/4L x 13 1/2W x 25H