Several cavity-nesting birds will happily use gourd birdhouses, including wrens, chickadees, tree swallows, bluebirds, and purple martins. Many experienced gourd birdhouse growers prefer a 1½-inch entrance hole because it comfortably attracts several of these small backyard birds. With the right placement and entrance size, a natural gourd birdhouse can provide a safe and welcoming nesting space for many species.

If you’ve ever hung a gourd birdhouse in your yard, you know the excitement of waiting to see who moves in. Gourd birdhouses have been used for centuries as natural nesting spaces, and many birds across North America readily adopt them.

Because we work directly with experienced gourd birdhouse farmers and growers, we've been able to see firsthand which birdhouse sizes consistently attract backyard birds. Over time we've found that about 80% of the birdhouses we make use a versatile 1½-inch entrance hole, which works beautifully for birds like wrens and chickadees and can welcome other small birds as well.

Let’s take a look at which birds commonly use gourd birdhouses, where they live, and what entrance hole sizes they prefer.

The Wren: The Comedian of the Birdhouse World

Wrens are famous for their energetic personalities and their willingness to move into almost any birdhouse they can squeeze into. If you hang a gourd birdhouse in your yard, there’s a very good chance a wren will discover it first.

These tiny birds are curious, vocal, and surprisingly bold. They’ll happily build nests in gourds, wooden houses, flowerpots, mailboxes, boots, and even old cans if the entrance hole works for them.

Although some birdhouse charts recommend smaller openings, wrens regularly nest in gourd birdhouses with a 1½-inch entrance hole, which is the standard size used in many of the birdhouses we make.

Where they live
Most of the United States and southern Canada

Preferred entrance hole size
1" – 1½"

Fun fact
Male wrens sometimes build several “decoy nests” in nearby birdhouses before the female chooses the one she likes best.

A Note About Wrens (They Always Make Me Smile)

Wrens are truly the wildcards of the birdhouse world — and they always make me smile.

They will:

• investigate almost any birdhouse they can find
• sing loudly from rooftops and fences
• build several nests before choosing one
• fiercely defend the house they decide to claim

Because wrens are so protective of their nesting area, hanging a birdhouse right next to your front door can sometimes be a mistake. Once a wren family moves in, they may loudly scold anyone who comes too close to their home — which can make entering your house a little entertaining (and occasionally difficult).

Another fascinating behavior happens after the babies hatch. Parent wrens are extremely tidy and actually remove the babies’ waste in their beaks to keep the nest clean. If you ever notice wrens flying out of the birdhouse carrying something small, that’s usually what they’re doing.

Chickadees: Our Curious Neighbors

Chickadees are small, friendly birds that are easy to recognize by their black caps and cheerful “chick-a-dee-dee-dee” calls.

They love cozy nesting cavities and are very comfortable moving into gourd birdhouses. Even though traditional birdhouse charts sometimes recommend a slightly smaller hole, chickadees adapt very well to the 1½-inch entrance used in many natural gourds.

Because of this, the standard gourd birdhouse size used by many growers works wonderfully for them.

Where they live
Across most of the United States and Canada

Preferred entrance hole size
1⅛" – 1½"

Fun fact
Chickadees hide thousands of seeds during the year and can remember where many of them are months later — making them the tiny geniuses of the backyard bird world.

Tree Swallows: Elegant Aerial Insect Hunters

Tree swallows are sleek, shimmering birds that flash blue-green in the sunlight as they swoop across fields and ponds catching insects.

They prefer open spaces near water or meadows, and they often do best when birdhouses are spaced apart.

Where they live
Northern United States, Midwest, and Canada

Preferred entrance hole size
1⅜" – 1½"

Fun fact
Tree swallows spend most of their day flying. Watching them hunt insects in the air can look like a tiny aerial acrobat show over your backyard.

Bluebirds: A Backyard Favorite

Eastern bluebirds are one of the most beloved backyard birds in North America. Their bright blue feathers and gentle personalities make them a favorite among bird watchers.

While they are more commonly associated with wooden nest boxes, they will sometimes use gourd birdhouses if the entrance hole size is right and the house is placed in open areas.

Where they live
Eastern and central United States

Preferred entrance hole size
Around 1½"

Fun fact
Bluebirds are famously patient parents. Both mom and dad share the job of feeding their hungry chicks hundreds of insects every single day.

Purple Martins: The Famous Gourd Nesters

Purple martins are perhaps the most famous birds associated with gourd birdhouses. In fact, entire colonies of purple martins are often raised in large hanging gourds.

These beautiful swallows prefer larger gourds with plenty of interior space and usually nest in colonies.

Where they live
Eastern United States, Midwest, and southern Canada during breeding season

Preferred entrance hole size
2" – 2⅛"

Fun fact
Purple martins can eat thousands of flying insects every day, making them one of the best natural mosquito patrols you could ever invite into your yard.

What Size Hole Should a Gourd Birdhouse Have?

Many experienced gourd birdhouse growers prefer a 1½-inch entrance hole because it works well for several small backyard birds, especially wrens and chickadees.

While some species have slightly different recommended sizes, this versatile entrance size allows multiple birds to comfortably use the same style of birdhouse.

After working with experienced gourd farmers and birdhouse makers, we've found that roughly 80% of the birdhouses we make use this size, and it consistently attracts backyard birds.

Birdhouse Hole Size Chart for Backyard Birds

Where to Place a Gourd Birdhouse

Placement can make a big difference in whether birds decide to move in.

For best results:

• Hang the birdhouse 6–10 feet above the ground
• Place it near shrubs, trees, or garden areas
• Choose a location not in direct harsh sunlight
• Provide nearby branches where birds can perch

Too much direct sun can make a birdhouse dangerously hot for eggs and baby birds, so a lightly shaded area is ideal.

It’s also best to place birdhouses away from busy doors or high-traffic areas.

Birdhouses and Outdoor Cats

If there are outdoor cats or stray cats in your neighborhood, you may need to be a little more thoughtful about where you place your birdhouses.

Cats are skilled hunters and can climb trees, fences, and posts, so placing birdhouses where they cannot easily reach them helps keep nesting birds safe.

To help protect nesting birds:

• Hang birdhouses at least 6–10 feet above the ground
• Place them away from fences, railings, or branches that cats could use as jumping points
• Avoid placing birdhouses directly on tree trunks that are easy for animals to climb
• Choose locations where the birdhouse hangs freely from a branch or hook

Gourd birdhouses work especially well for this because they are typically hung rather than mounted. The smooth surface and round shape make it harder for predators to grab onto.

Tip: A birdhouse that can hang and move slightly in the breeze is much harder for predators like cats to reach than a fixed birdhouse attached to a tree or post.

Even in neighborhoods with outdoor cats, many birds will still nest successfully when birdhouses are placed carefully and high enough off the ground.

Common Birdhouse Mistakes (And How to Avoid Them)

Putting up a birdhouse is exciting, but a few common mistakes can make it harder for birds to move in.

Placing the birdhouse in direct sun
Birdhouses that receive intense afternoon sun can become dangerously hot for eggs and baby birds. It’s best to hang birdhouses where they receive morning sun but some shade during the hottest part of the day.

Hanging the birdhouse too low
Birdhouses placed too close to the ground are easier for predators to reach. Most small birdhouses should be hung about 6–10 feet above the ground.

Mounting birdhouses where predators can climb
Mounting a birdhouse directly on a tree trunk, fence post, or railing can make it easier for predators like raccoons, squirrels, or cats to reach the nest.

Placing birdhouses too close to busy areas
Birds usually prefer quieter spots for nesting, although determined wrens sometimes ignore this rule completely.

Putting birdhouses too close together
Many small birds are territorial during nesting season. Spacing birdhouses apart helps give each nesting pair their own space.

One notable exception is purple martins, which actually prefer communal living and often thrive when multiple gourds are hung together in clusters.

Looking for a Ready-to-Hang Birdhouse?

Our handcrafted gourd birdhouses are grown, cleaned, and finished to provide safe nesting spaces for backyard birds like wrens, chickadees, and swallows.

Browse our collection of handcrafted gourd birdhouses:
https://gourdaments.us/collections/gourd-birdhouses