Eight inches of silent nocturnal pest control has been circling your neighborhood every night looking for a cavity to move into.
The Eastern Screech Owl hunts mice, voles, moths, beetles, crickets, and cockroaches — every night, year-round, in any weather. She hunts by sound with asymmetric ears that triangulate prey in total darkness. She catches mice under snow, in leaf litter, and inside open garages.
She can't find a place to nest. The old dead trees have been removed. The fence posts are capped. The eave gaps are sealed.
One box fixes it.
The build:
- Untreated cedar or pine planks, three-quarter inch thick. No stain, no paint, no pressure-treated wood — the chemicals leach and owls press their bodies against the interior walls
- Interior floor eight by eight inches, chamber fourteen to sixteen inches tall
- Entrance hole exactly three inches — this admits screech owls and excludes starlings. Every quarter-inch matters
- A small wooden baffle inside, four inches below the entrance hole — this prevents raccoon arms from reaching eggs on the floor
- Four small drainage holes in the floor corners. Two inches of dry pine or aspen wood shavings on the floor — she doesn't build a nest, she lays eggs directly on whatever's there
- Hinged side panel for annual cleanout in late September
The placement:
- Eight to twelve feet up on a tree trunk or standalone pole
- Entrance facing east or south — morning sun warms the box, storms come from the west
- Clear flight path with no branches within three feet of the entrance
- Partial afternoon shade — full sun overheats the box in summer
- At least fifty feet from bird feeders — she'll hunt feeder birds if they're close
- Mount a metal cone baffle below the box on the pole to block raccoons and snakes from climbing
What to expect:
- Mount before April — she's scouting cavity sites right now in March
- If she doesn't move in the first year, leave the box. Occupancy rates jump in the second season once the box looks established
- When she's not nesting, the box attracts secondary tenants — flying squirrels in winter, great crested flycatchers in summer
- If a starling claims the box first, remove the starling nest material weekly — European Starlings are invasive and not protected
Forty-five minutes. Fifteen dollars in lumber. The owl is already in your neighborhood — she just needs an address
