Nest Box Plans

Nature’s Best Pest Control

Most birds of prey aren’t picky eaters and will eat prey like mammals, birds (including other birds of prey), insects, amphibians, and reptiles. Some owls—like the Great-Horned Owl—have been known to dine on skunks and even porcupines! Though owls’ general diets vary species to species, rodents are a staple for most owls, making them excellent natural pest control.

You can attract these wild neighbors to your own yard by building nestboxes! It is important to do your research before installing a nestbox; an improperly installed nest box can do more harm than good. American Eagle Foundation recommends using our nestbox plans and Cornell Lab’s NestWatch to determine which owl box works best with your habitat.

Barn Owl size Nest Box Plans
Screech Owl or American Kestrel Nest Box Plans

One of the most effective rodent hunters is the mythic Barn Owl because of their voracious appetites and potential to rear large broods. Sustainable agriculture uses them as part of “integrated pest management” by placing nestboxes in areas with large populations of gophers, mice, rats, and other pests that would harm their crops. A single breeding pair of barn owls can consume 3,000 rodents annually; a three-year study by field researcher Mark Browning observed a large population of barn owls taking 25,682 rodents over the course of two years.

How can You Give a Hoot?

If you’d like to be an Owl Pal, consider adopting the following practices:

–Use natural deterrents or raptor-safe traps instead of poisons or sticky traps to control rodents. Rodenticides can kill raptors and other predators through secondary poisoning, and, because of this, they actually increase rodent populations over time by eliminating their natural predators. Sticky traps are not only inhumane, but they often trap more than the target species. American Eagle Foundation recommends Goodnature traps as a raptor-safe alternative to traditional pest control methods.

–Don’t litter! Tossing food out of your car window attracts rodents and other scavengers to the roadside, which in turn attracts their predators; this is compounded by the fact that even food we perceive as “biodegradable” takes longer to decompose than we might believe. Some fruit—like apple cores and banana peels—can take years to biodegrade! Collisions with vehicles are a common threat impacting owl populations for this reason.

–If possible, leave dead trees untouched to preserve owl nesting spaces. Many owl species are cavity roosters and nesters, so these trees provide shelter and nesting sites for your local nocturnal neighbors. Of course, safety to people and property should be considered when leaving dead trees untouched.

–Plant native or mow less to provide owls with hunting territories. Native grasses and plants help sustain local wildlife. The truth is that many grass species used in perfectly manicured lawns are invasive and provide little benefit to native fauna. If you have an abundance of land, consider leaving strategic spots unmowed or leaving brush piles to provide habitat for owls’ prey.

–Build nest boxes in areas where dead trees or nesting cavities are scarce. Nest boxes are an excellent way to help owl populations while also gaining the benefit of free pest control! Research your ecosystem to identify what owl species you can support and how to properly install a nestbox. Watching owls take up residence in a box is fun for the whole family!

-Keep your cats indoors. Outdoor cats pose a risk to birds and other wildlife, disrupt ecosystems, and spread disease; according to American Bird Conservancy, cats kill between 500 million and one billion birds each year, along with billions of small mammals.

-Avoid using dangerous decorations around the holidays. Fake spider webs, Christmas lights, and sky lanterns all are tangle hazards for owls. Ensure that Christmas lights are secured and avoid using fake web outdoors.

-Remove hazardous litter from the environment. Old barbed wired, sport nets, and baling twine are hazardous to owls and all birds of prey. If the sport nets are frequently used, consider taking them down between sports matches.