Owl Boxes
Nature's most efficient pest control — waiting for an invitation
Why Install an Owl Box?
Installing an owl box isn't just about enjoying wildlife — it's about creating a partnership with one of nature's most efficient predators.
Natural Pest Control
A single barn owl can eat up to 12 mice per night. Over a breeding season, one family will consume approximately 3,000 rodents — for free.
Conservation Impact
Owl populations face serious pressure from habitat loss. Your owl box directly replaces natural cavities that are disappearing across the landscape.
Wildlife Watching
Watch owls hunting at dusk, hear their calls at night, and observe owlets peeking out as they grow. Many people add cameras to watch the entire nesting process.
"Forget expensive exterminators and toxic rodenticides. Barn owl boxes have become a cornerstone of integrated pest management for farmers and vineyards. It's cheaper, safer, and more sustainable than any chemical alternative."
Watch: Owl Box Habitat at Private Lands Wildlife
Which Owls Use Nest Boxes?
Not all owls will use a nest box. Large owls like Great Horned Owls prefer open stick nests — they won't squeeze into a wooden box. But several species readily adopt man-made housing.
Owls That Use Nest Boxes
| Species | Box Size | Likelihood |
|---|---|---|
| 🦉 Barn Owl | Large (deep box) | Very High |
| 🦉 Eastern Screech Owl | Small-Medium | Very High |
| 🦉 Western Screech Owl | Small-Medium | High |
| 🦉 Barred Owl | Large | Moderate |
| 🦉 Northern Saw-whet Owl | Small | Moderate |
| 🦉 Boreal Owl | Small-Medium | Moderate |
Owls That Don't Typically Use Boxes
Great Horned Owls prefer open platform nests. Snowy and Short-eared Owls are ground nesters. Long-eared and Great Gray Owls use old stick nests. These species won't use a box — but the ones that will are the best pest controllers of all.
The good news? The owls most likely to use boxes — barn owls and screech owls — are also the best pest controllers and most adaptable to human landscapes.
Owl Box Plans: Dimensions by Species
One of the biggest mistakes people make is using the wrong size box. An entrance hole that's too small won't let the owl in. A hole that's too big invites predators. Here are the recommended dimensions:
Screech owl boxes also work for Northern Saw-whet Owls and American Kestrels.
Owl Box Plans & Diagrams
These technical drawings show the exact dimensions for each species. Print them out, take them to the hardware store, and build your own — or use them to verify any box you purchase meets the right specs.
🦉 Screech Owl Box Dimensions
Small BoxAlso works for Northern Saw-whet Owls and American Kestrels.
🦉 Barn Owl Box Dimensions
Medium BoxDeep design is critical — prevents owlets from falling before they can fly.
🦉 Barred Owl Box Dimensions
Large BoxBarred owls prefer mature forests near water and are pickier about location.
Where to Put an Owl Box
Location matters as much as the box itself. The perfect owl box in the wrong spot will sit empty for years.
Direction & Height
Face your box south or southeast, away from prevailing winds and rain. In most of North America, east-facing boxes also work well — morning sun warms the box. Avoid north and west-facing placements.
Forest edges, suburban yards with mature trees, near water. Mix of open ground and tree cover.
Open grasslands and farmland. Within 1 mile of rough meadow where rodents live. Avoid dense forests.
Mature deciduous forests near streams and wetlands. Large unbroken woodland tracts.
What to Avoid
⚠️ Avoid placing boxes near busy roads, outdoor cats, or pesticide-heavy areas. Rodenticides poison owls through their prey — if you want owls, eliminate all rodent poison use.
When to Install an Owl Box
Owls don't nest year-round, and they often scout nest sites months before breeding. The best time to install is late fall to early winter (October–December). This gives owls time to discover the box before breeding season begins.
If you miss the window, install the box anyway. Owls may not use it the first year, but they often return to investigate once they've discovered it. Add 2–3 inches of wood shavings to the bottom — owls don't build nests.
Ready to Invite Owls Home?
Don't have time to build your own? These are our top picks for quality owl boxes shipped right to your door.
Ready-to-mount cedar box sized perfectly for screech owls and saw-whet owls. Comes with wood shavings included — just mount and wait!
- 3″ entrance hole — predator resistant
- Natural cedar — safe for wildlife
- Wood shavings included
- Easy clean-out panel
Deep, spacious cedar design with the large oval entry barn owls need. Perfect for farms, barns, and open meadow properties with rodent pressure.
- Large oval entrance — barn owl sized
- Deep box prevents owlets from falling
- Natural cedar construction
- Pole or wall mountable
Spot owls hunting at dusk, identify species at the box entrance, and watch wildlife across your property. A must-have for any serious wildlife watcher.
- High magnification — see owls clearly
- Low-light optimized — perfect at dusk
- Lightweight — comfortable for long use
- Includes carrying case & strap
Where Do Owls Sleep?
Daytime Roosts
Owls are mostly nocturnal, which means they sleep during the day — but not in nests. Nests are only for raising young.
The rest of the year, owls sleep in roosts — sheltered spots where they can hide from predators and avoid detection. Common roosting spots include tree cavities, dense evergreen trees, barn rafters, thick vine tangles, and branches pressed against the trunk for camouflage.
Do Owls Sleep Standing Up?
Yes! A tendon mechanism keeps their grip tight even while completely relaxed. Baby owlets sometimes sleep face-down because their heads are too heavy.
Can You See Owls During the Day?
Sometimes. Look for whitewash (droppings) under trees, owl pellets on the ground, or crows mobbing a roosting spot. Barred owls are most often active in daylight.
What Do Owls Eat?
Owl Diets by Species
Owls are carnivores — they eat meat exclusively. Their diet is precisely why they're such valuable pest controllers.
| Species | Primary Diet |
|---|---|
| Barn Owl | Mice, voles, rats, shrews |
| Screech Owl | Large insects, mice, small birds, earthworms |
| Barred Owl | Mice, voles, rabbits, squirrels, crayfish, frogs |
| Great Horned Owl | Rabbits, skunks, squirrels, other raptors, even cats |
| Snowy Owl | Lemmings, rabbits, waterfowl |
Why Owls Are Better Than Poison
"Rodenticides don't just kill rodents — they poison everything up the food chain. A breeding pair of barn owls removes over 3,000 rodents annually, year after year, without poisoning your soil, water, or wildlife."
Colors of Owls: Identification Guide
Why Owl Colors Matter
Owls aren't flashy like cardinals or bluebirds. Their colors are designed for one purpose: camouflage. But within that muted palette, there's surprising variety.
| Color Pattern | Species Examples |
|---|---|
| Mottled brown/gray | Great Horned Owl, Barred Owl, Long-eared Owl |
| Reddish-brown (rufous) | Eastern Screech Owl (red morph) |
| Gray | Eastern Screech Owl (gray morph), Great Gray Owl |
| White with brown bars | Snowy Owl (females and juveniles) |
| Pure white | Snowy Owl (adult males) |
| Golden-buff with gray | Barn Owl |
Common Owl Colors
Most owls wear mottled browns, grays, and whites for camouflage. Eastern Screech Owls come in two color morphs — gray (common in northern states) and reddish-brown rufous (more common in southern states). Both morphs can occur in the same family.
Screech Owl Morphs
The gray morph blends with maple, oak, and beech bark. The red morph matches reddish pine and cedar bark. The color you see most depends on the dominant trees in your area.
Owl Eye Colors
| Eye Color | Species | Hunting Time |
|---|---|---|
| 🟡 Yellow | Great Horned Owl, Snowy Owl, Great Gray Owl | Nocturnal |
| 🟠 Orange | Long-eared Owl, Short-eared Owl | Twilight (crepuscular) |
| ⚫ Dark brown | Barred Owl, Barn Owl, Spotted Owl | Dawn & dusk |
Size of Owls: Smallest to Largest
Owls range from tiny hunters smaller than a robin to massive predators with 5-foot wingspans.
| Species | Length | Wingspan | Weight |
|---|---|---|---|
| Elf Owl | 5–6″ | 10″ | 1.5 oz |
| Northern Saw-whet Owl | 7–8″ | 17–19″ | 2.5–4 oz |
| Eastern Screech Owl | 6–10″ | 19–24″ | 4–9 oz |
| Barn Owl | 12–16″ | 42–44″ | 14–25 oz |
| Barred Owl | 17–20″ | 39–44″ | 1.3–2.3 lbs |
| Great Horned Owl | 18–25″ | 40–57″ | 2–5.5 lbs |
| Snowy Owl | 20–27″ | 49–59″ | 3.5–6.5 lbs |
| Great Gray Owl | 24–33″ | 54–60″ | 1.5–4 lbs |
When Do Owls Nest & Lay Eggs?
Nesting Calendar
Owls nest earlier than most birds. While songbirds wait for warm spring weather, many owls are already incubating eggs in the dead of winter.
| Species | Courtship | Eggs Laid | Eggs Hatch | Young Fledge |
|---|---|---|---|---|
| Great Horned Owl | Nov–Dec | Jan–Feb | Feb–Mar | Apr–May |
| Barn Owl | Feb–Mar | Mar–May | Apr–Jun | Jun–Aug |
| Barred Owl | Jan–Feb | Mar–Apr | Apr–May | May–Jun |
| Eastern Screech Owl | Feb–Mar | Apr–May | May | Jun–Jul |
Why Do Owls Nest So Early?
Great Horned Owls start nesting in January — sometimes sitting on eggs during blizzards. They nest early so young become independent when rodent populations peak in late summer, and to claim the best territories before hawks arrive.
What Happens in the Nest?
Owls don't build nests — they lay eggs directly on debris or wood shavings. Eggs are laid 2–3 days apart, and chicks hatch asynchronously. Even after fledging, juveniles follow parents and beg for food well into fall.
How to Attract Owls Beyond the Box
Habitat Requirements by Species
An owl box is just the beginning. To truly attract owls, you need to create owl-friendly habitat. For more on owl conservation and population data, visit the U.S. Fish & Wildlife Service Migratory Birds program.
Leave Dead Trees Standing
Snags provide natural cavities for nesting and roosting. If a dead tree isn't a safety hazard, leave it. One snag can provide habitat for decades.
Reduce Lawn, Add Native Plants
Manicured lawns are owl deserts. Convert some lawn to native meadow grasses or brush piles — these support the mice and voles owls eat.
Eliminate Rodenticides
Rodent poison kills owls through secondary poisoning. If you want owls as pest control, you cannot also use poison — period.
Provide Water
A simple birdbath or pond makes your property more attractive. Barn owls especially love to bathe.
Reduce Outdoor Lighting
Bright lights disrupt owl hunting. Motion-sensor lights are better than always-on floodlights. Let the darkness return to your yard.
Keep Cats Indoors
Outdoor cats kill billions of birds annually and compete with owls for prey. Indoor cats = owls that thrive.
Frequently Asked Questions
Owl Gifts & Gear
For the owl lover in your life — or yourself. No judgment.
Soft, comfortable, and instantly recognizable to every owl lover. Makes a great gift.
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Five bold colorful owls lined up and ready to party. Lightweight and fun.
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Stunning moonlit owl design. Keeps drinks cold 24hrs, hot 12hrs. A showstopper.
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Stanley-style 40oz with handle, straw and leak-proof lid. The owl lover's everyday carry.
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Teach Your Kids About Wildlife
Love sharing nature with your children? The Whispering Woods: The Hidden Door takes kids on a magical adventure where they learn about wildlife habitat through an enchanted forest.
Join Elara and Scout and friends as they discover the secrets of the natural world — the same world where owls, squirrels, and songbirds are raising their families right now.
Perfect for ages 7–12. Your kids will finish this book wanting to build an owl box.
Buy on Amazon →Install a Box.
Create Habitat.
Be Patient.
An owl box is more than wood and nails — it's an invitation to one of nature's most remarkable hunters.
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