As the days grow longer and temperatures begin to rise across Ontario, a familiar and exciting shift is underway in our backyards. Birds are singing with renewed energy, territories are being claimed, and prospective parents are actively “house-hunting.” Spring nesting season has arrived, and for backyard bird enthusiasts, it’s the perfect time to step into the role of a thoughtful and responsible bird landlord.

At Urban Nature Store, we believe that a well-prepared nesting space not only supports local bird populations but also offers you a front-row seat to one of nature’s most rewarding seasonal displays. Whether you’re hoping to attract chickadees, wrens, or even bluebirds, a little preparation now can make all the difference.

Start Fresh: Clean Houses - New Life

Before any new tenants move in, it’s essential to start with a clean slate. Old nesting material, droppings, and debris can harbor parasites and bacteria that may harm future broods. Open up your bird house and remove all leftover material from the previous season.

A simple cleaning with warm water and mild soap is usually sufficient. Avoid harsh chemicals, as residues can be harmful to birds. Once cleaned, allow the box to dry thoroughly before reinstalling it outdoors.

Many modern bird houses available at Urban Nature Store are designed with easy-open panels or hinged doors, making seasonal maintenance quick and stress-free—an important feature for anyone serious about supporting repeat nesting.

The Right Door Makes All the Difference

It may seem like a small detail, but the size of the entrance hole plays a crucial role in determining who moves in—and who stays out.

For most small songbirds, such as chickadees and wrens, an entrance hole between 1" and 1.25" is ideal. This size helps prevent larger, more aggressive species like House Sparrow from entering and taking over the nest.

However, if you’re hoping to attract Eastern Bluebirds, you’ll need a slightly larger opening—typically around 1.5". Bluebirds are highly sought after by bird lovers, but they can be vulnerable to competition and predation, so proper sizing and placement of their nesting boxes is especially important.

Predator guards and hole restrictors—both available through Urban Nature Store—can add an extra layer of protection, helping ensure that your feathered tenants raise their young safely.

Location, Location, Location

Just like in real estate, placement is everything.

Birds prefer quiet, sheltered areas for nesting, away from the hustle and bustle of feeding stations and bird baths. While feeders are great for attracting birds, nesting birds are looking for privacy and security.

Mount your bird house on a tree, pole, or under the eaves of your home, ideally 5–10 feet above the ground. Ensure it’s positioned away from prevailing winds and strong afternoon sun. A slightly shaded, east-facing orientation is often ideal in our regional climate.

If you’re installing multiple houses, be mindful of spacing. Different species will often coexist peacefully, but members of the same species can be territorial. If you notice disputes, try placing additional boxes on opposite sides of your yard or home, out of direct sightlines.

It is also important to ensure that the house is not placed too close to a feeder.  Yes mommy bird likes the convenience of a close food source, but she quickly realizes that busy feeder, can scare her and her babies.

Managing Competition and Conflict

It’s not uncommon to witness a bit of drama during nesting season. Birds compete for prime real estate, and disagreements can arise.

One simple solution? Add more housing.

By offering a variety of bird houses—each with slightly different dimensions and entry sizes—you can accommodate multiple species and reduce competition. This diversity not only benefits the birds but also enhances your backyard birdwatching experience.

Monitoring your bird houses regularly is also key. Keep an eye out for invasive species attempting to take over nests, especially House Sparrows, which can displace native birds and even destroy eggs.

Maintenance Matters: Multiple Broods, Multiple Opportunities

Many backyard birds raise one to three broods each season. That means your bird house could host several families between early spring and late summer. After each brood fledges, take a few minutes to clean out the box. Removing old nesting material makes the space more appealing for the next round of tenants and reduces the risk of parasites. Think of it as turning over a rental unit—fresh, clean, and ready for new occupants.

Offer Safe, Natural Nesting Materials

While it may be tempting to help birds by offering soft materials, not everything is safe.

A common misconception is that dryer lint makes excellent nesting material. In reality, it can be harmful. Dryer lint often contains chemical residues from detergents and fabric softeners, and it disintegrates when wet, potentially endangering nestlings.

Similarly, pet fur can pose risks if animals have been treated with flea or tick medications.

Instead, opt for natural, chemical-free materials like untreated cotton, natural untreated wool, or plant fibers. Urban Nature Store carries specially curated nesting material blends and holders that allow birds to safely collect what they need.  At Urban Nature Store we sell natural untreated wool direct from the sheep at Oliver Farms.  It is a little smelly, but the birds really love the natural smell and texture. These products not only support bird health but also give you the joy of watching birds gather and build their nests—one of the most fascinating behaviours in the avian world.

Make This Your Best Nesting Season Yet

Spring nesting season is a fleeting but magical time. With a bit of preparation and the right tools, you can transform your backyard into a safe haven for birds to raise their young.

From properly sized bird houses to predator guards and safe nesting materials, the team at Urban Nature Store has everything you need to support your local bird population.

So take a few moments this week to inspect, clean, and optimize your bird houses. Your future feathered tenants are already searching for their next home—and with your help, they just might choose your backyard.

Happy birding!