Monday, April 20, 2020

Attract Barred Owls to your yard with nest box

Barred Owls are one of 5 species of owls that can be found commonly in residential backyards in some areas of the United States.

Barred Owls are larger than Barn Owls but smaller than Great Horned Owls. If you have large trees in your yard and live near a forested ravine or swamp, you may be able to attract Barred Owls to your yard with a nest box.

Barred Owls are found in forests, especially near water, from eastern Texas to Minnesota eastward in the United States to Florida and Maine. They are also found in southern Canada from Newfoundland to Manitoba. They then are found in mid Saskatchewan and Alberta and throughout much of British Columbia, SE Alaska, and the Pacific Northwest to northwestern California.

Photo of Barred Owl
Barred Owl
Image by mpmochrie from Pixabay

What makes your yard attractive to Barred Owls?


The typical habitat of Barred Owls includes mature deciduous or mixed woods. Locations can include canyon streams with big trees, wooded ponds, even forests with a closed canopy hiding the sky and more open underneath. They occur in wooded parks in towns, but especially river edge forests.

They stay deep in the wet woods on big limbs in the shadowed canopy under the big trees.

Does this sound like your backyard? If so, and you live in the regions mentioned above, you may be able to attract Barred Owls to your yard!

There should be nearby woods for these owls to hunt in that remain dark at night. There should not be too much people and machinery noise during the day. To keep the owls safe from vehicles, don't put owl boxes too near a busy highway.

Barred Owls are large predators. They have been known to kill and eat housecats. It is possible that a nesting owl may attack small dogs. Such a thing would be very rare for this species of owl. But it is something to consider before attracting Barred Owls to be daily residents of your backyard.

This owl doesn't actively go out and fly around seeking your favorite pet as prey. It sits on a perch and waits for small animals to pass by. Thus, it isn't likely to harm small dogs going outside for a potty break before bed--especially if you turn on the lights. It's not impossible, just not very likely that a Barred Owl would attack your dog. Cats roaming around at night seeking rodents will put them in the path of hunting owls, though.

Barred Owls have been known to fly at or strike people in the head with their claws if they get too close to the nest. It seems that early morning joggers in the forest parks are the main victims! Often the owls don't make actual contact. Sometimes they knock people's hats off! Rarely do they draw blood.

Barred Owl nests in nature


Typically, Barred Owls nest in tree cavities. These are usually quite high, 20-40 feet above the ground. They may also use old stick nests of hawks and ravens.

As with most owls, they really don't add much to the nest. They may trample or flatten old hawk or owl nests to make them more suitable. They rarely add lichens, a conifer twig, or a feather or two to the nest.

Courtship begins in February. Nesting continues through August. Barred Owls call all year and vigorously defend their territory against other Barred Owls.

Barred Owls lay 2-5 eggs, 3-4 typical. They only breed once during the nesting season. Females incubate 28-31 days. Once they hatch, the nestlings remain in the nest 28-35 days before fledging.


This video shows what goes on inside a Barred Owl nest!


The Barred Owl nest box


Natural cavities in older trees in a mixed forest are a bit in short supply in most places. Thus, Barred Owls will readily accept an artificial nest box.

Barred Owl nest box dimensions


Barred Owls can use a large Barn Owl house. In fact, the larger size the better for Barn Owls. So both types of owls can use a nesting box designed for the Barred Owl. The Barred Owl prefers a slightly larger entrance hole. The Barn Owl might like a larger floor size.

The floor should be about 12x13 inches. The box should be about 24 inches tall. The nest box entry hole should be 7x7 or even wider at 7x8 inches.

Whether you make a nest box following plans and designs, or purchase one pre-made, try to use these dimensions.

Barred Owl nest box dimensions overview
  • 12x13 inch floor (minimum)
  • 24 inches tall (minimum)
  • 7x7 inches (or wider) entrance hole at least 13 inches up from the floor
  • 15-25 feet high off the ground

Some kind of exercise shelf or perch outside the box is desirable for the chicks to use as they get larger and start to explore their world. The older chicks will venture out of the box before they are ready to be off on their own. Thus, it would be good to have a branch near the nest box so that the young can fly-hop and get back in the box at night.

Do not place more than one nest box in the immediate area. Barred Owls are very territorial as previously discussed. Keep owl boxes at least 1/2 a mile apart.

Add 3 inches of wood shavings to the bottom of the box. You may also use clean leaves and moss.


Here is an owl box sold on Amazon that is suitable for Barred Owl in woods.



Barred Owl nest box placement


Nest boxes for Barred Owls must be placed within the dense forest, not on the edge. So don't place a nest box on a building or a bare pole.

Inside the woods the direction the Barred Owl house faces doesn't matter as much. The entrance hole should face away from the prevailing rain direction, if possible.

The height of the nest box is not overly critical. Anything over about 15 feet in height should be fine. One person mentioned how he placed nest boxes on trees on the side of a ravine. The nest box was attached and faced downhill, so it seemed higher on the stream side of the tree.

Keep raccoons from taking over the nest box. They may use it themselves. They may eat the eggs or nestlings. Place a predator guard all around the tree trunk using metal flashing. Place this at least 6 feet high on the tree. Place it higher if people are likely to damage it.

It is best for the owl chicks to have branches near the nest box. They can practice flapping and fly-hopping through the tree and make it back to the nest box at night. The longer they stay at the nest site before fledging the more likely they are to survive.

However, there should be a clear flight path straight into and out from the nest box. Adult owls flying directly into the nest hole shouldn't encounter any other trees, branches, or leaves for at least 20 feet from the front of the nest.

The nest should ideally be in a hardwood (maple, ash, hickory or similar large branching tree). One should try to makes sure there is a dense evergreen, such as a hemlock, nearby. Owls can approach the nest area unseen and hide or roost in this dense conifer. Remember, the female incubates the eggs and chicks. The male remains outside the nest during the day (and night) and brings food to the mother and young.


Here is a video of how one person hangs up a nest box for Barred Owls in a tree in a younger forest. Pay attention to the habitat. It is more open and a younger woods than expected. But it is wet and isolated!



Nest box competitors and maintenance


Winter is probably the best time to put up an owl nest box. Even so, it seems that Barred Owls may find a nest box while prospecting in winter or spring, yet wait an entire year to actually use the box. Thereafter, they generally use the same nest site as long as it is in decent shape.

However, if owls don't move in right away, other animals might. Wood Ducks may compete with Barred Owls for the nest box. Squirrels and raccoons will also want the box. A predator guard should deter the raccoons. Squirrels may be the hardest to keep out.

You may wish to examine older boxes in December. Clean out any squirrel nests. Use a mirror on a stick and flashlight to make sure the owl box isn't inhabited by an owl or raccoon before you open it up. It could be dangerous for you to have an animal jump out of the nest box while you are 20 feet up on a ladder!

Barred Owls might not make as much of a mess of their nest as some other owls. So cleaning the nest box yearly isn't always necessary. However, there could be eggs that didn't hatch or dead chicks or prey that didn't get eaten. Squirrels could have filled the box with leaves. So it's best to at least check.

When you clean out the nest box you can add 3 inches of wood shavings.



You may like: 5 Common backyard owls



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