What birds nest in house walls?

House Sparrow (Passer domesticus) | Rob Christiaans

Birds nesting inside house walls can be difficult to identify at first. You may hear chirping behind the drywall, scratching near the ceiling, fluttering beneath the siding, or the repeated arrival and departure of a bird through a tiny exterior opening.

In North America, House Sparrows and European Starlings are among the birds most likely to actually nest in house walls and other building cavities. Depending on where you live, House Wrens, Bewick’s Wrens, Violet-green Swallows, chickadees, swifts, pigeons, and occasionally other cavity-nesting species may also use openings associated with homes.

The bird’s size, the location of the entrance, the surrounding habitat, and the sounds coming from the wall can all help narrow down the identification.

⚡ Quick Answer: Birds That May Nest in House Walls

Bird	Likelihood Around Houses	Common Nest Location
House Sparrow	Very high	Walls, eaves, roofs, vents and other building holes
European Starling	Very high	Wall cavities, roof openings, vents and soffits
House Wren	Moderate	Small cavities, crevices, sheds and unusual enclosed spaces
Bewick’s Wren	Moderate regionally	Cavities, ledges and outbuildings
Violet-green Swallow	Moderate in western North America	Building cavities, eaves and nest boxes
Black-capped Chickadee	Occasional	Small cavities and nest boxes
Carolina Chickadee	Occasional	Small cavities and nest boxes
Mountain Chickadee	Occasional in western mountains	Cavities, crevices and nest boxes
Rock Pigeon	Usually exterior spaces	Ledges, eaves, overhangs and large structural openings
Swifts	Usually chimneys	Chimneys and similar vertical cavities
Woodpeckers	Occasional	Wooden siding or larger cavities

🐦 House Sparrows

House Sparrows are one of the most likely birds to nest in the walls of a house.

These small birds have lived alongside people for generations and strongly favor human-made structures for nesting. They regularly use holes in buildings rather than relying exclusively on natural tree cavities.

A House Sparrow may squeeze through a relatively small opening and build its nest in the protected space behind it.

Common locations include:

Wall cavities
Gaps beneath siding
Eaves
Soffits
Roof openings
Vents
Spaces behind signs
Barns and sheds
Light fixtures
Nest boxes

House Sparrows build bulky nests from dried grass and other vegetation, adding softer materials such as feathers, paper and string.

Because they may reuse nesting locations, a wall opening that attracted sparrows one year can become a recurring problem.

How to identify a House Sparrow

Male House Sparrows have a gray crown, chestnut-brown areas around the head, pale cheeks and a black bib. Females are mostly brown and buff with a pale eyebrow.

They frequently make simple cheep calls.

If you see small brown birds repeatedly disappearing beneath the roofline or into a hole in the siding, House Sparrows should be high on your list of possibilities.

🐦 European Starlings

European Starlings are another extremely common bird in building cavities.

Starlings naturally seek enclosed spaces for nesting, and buildings provide an abundance of them. They may enter through gaps around the roof, broken soffits, vents, siding, fascia and other openings.

Starlings are considerably larger than House Sparrows, so they usually require a somewhat larger entrance.

Their nests may contain:

Grass
Pine needles
Leaves
Feathers
Bark
String
Cloth
Pieces of human-made debris

Once nestlings hatch, a family of starlings can produce a surprising amount of noise inside a wall.

How to identify European Starlings

During the breeding season, adults appear dark and glossy, often showing beautiful purple and green iridescence. Their bills become yellow.

Outside the breeding season, their plumage is covered in pale spots.

Starlings also have an extraordinary vocal range. You may hear whistles, squeaks, rattles, clicks and imitations of other birds.

If a medium-sized dark bird continually enters a hole in your house, a starling is a strong possibility.

🐦 House Wrens

With a name like House Wren, it is no surprise that this tiny bird sometimes nests surprisingly close to people.

House Wrens are cavity nesters and are famous for investigating unusual enclosed locations.

They commonly use:

Old woodpecker holes
Natural tree cavities
Nest boxes
Building crevices
Sheds
Other small protected openings

House Wrens fill much of their chosen cavity with small twigs before constructing a softer nest cup.

Although they are not as strongly associated with deep wall cavities as House Sparrows and starlings, a suitable opening around a house can certainly attract one.

How to recognize a House Wren

House Wrens are tiny brown birds with relatively plain plumage and an energetic personality. Their tails are frequently held upward.

Their loud, bubbling song seems surprisingly powerful for such a small bird.

🐦 Bewick’s Wrens

In western portions of North America and parts of the south-central United States, Bewick’s Wrens are another possibility.

Bewick’s Wrens use cavities and ledges for nesting and sometimes select human-made sites such as outbuildings and nest boxes.

They are especially likely around properties that combine shrubs, trees and open spaces.

Bewick’s Wrens can be distinguished from House Wrens by their:

Prominent white eyebrow
Long tail
Brown upperparts
Pale underparts
Frequent tail movements

A Bewick’s Wren is less likely than a starling or House Sparrow to be deeply embedded in a wall, but it may occupy an accessible protected cavity around the structure.

🐦 Violet-Green Swallows

In western North America, a sleek bird entering a high opening near the roof could be a Violet-green Swallow.

Violet-green Swallows are cavity nesters. Their natural nesting sites include holes in dead trees and cliffs, but they also use nest boxes and live around human settlements in parts of their range.

A suitable cavity beneath an eave or associated with another part of a house can resemble a natural nest site.

Identifying Violet-green Swallows

Look for:

Bright white underparts
White extending onto the sides of the face
Metallic green upperparts
Violet-purple coloring around the rump
Long, pointed wings
Extremely agile flight

You may see the adults circling through the air catching insects before repeatedly returning to the same hole.

🐦 Chickadees

Several species of chickadees are cavity nesters, including:

Black-capped Chickadees
Carolina Chickadees
Mountain Chickadees
Chestnut-backed Chickadees
Boreal Chickadees

Most chickadees strongly prefer natural tree cavities, decaying wood, old woodpecker holes and nest boxes.

They are therefore less likely to nest inside house walls than House Sparrows or European Starlings.

However, chickadees are tiny birds. A small protected cavity associated with a house may occasionally resemble the sort of enclosed space they naturally seek.

Black-capped Chickadees

Black-capped Chickadees often excavate nest chambers in soft, rotten wood but also use existing cavities and birdhouses.

A bird with a black cap, black throat and bright white cheeks may be this familiar species.

Carolina Chickadees

In the southeastern United States, the similar-looking Carolina Chickadee takes the place of the Black-capped Chickadee across much of the region.

It also depends heavily on cavities for nesting.

Mountain Chickadees

Mountain Chickadees live primarily in western coniferous forests. They often use existing holes made by woodpeckers and other birds.

Their bold white eyebrow makes them relatively easy to distinguish from other chickadees.

🐦 Rock Pigeons

Rock Pigeons usually nest on buildings rather than inside narrow residential wall cavities, but they deserve mention because people frequently hear them within larger structural spaces.

Pigeons favor protected ledges and recesses.

They may nest:

Beneath eaves
Under overhangs
Inside abandoned structures
On roof ledges
In large building openings
Beneath bridges
In barns and warehouses

Because pigeons are much larger than wrens or sparrows, they are unlikely to enter the tiny hole commonly associated with a bird nest inside a residential wall.

If you hear heavy movement from an attic, roof cavity or large open portion of a building, however, pigeons become more plausible.

🌆 What About Birds in Chimneys?

Sometimes homeowners believe birds are inside the walls when they are actually occupying the chimney.

Swifts are particularly famous for this behavior.

In eastern North America, Chimney Swifts historically nested in large hollow trees but adapted exceptionally well to masonry chimneys.

In western North America, Vaux’s Swifts may also use chimneys.

If numerous small dark birds circle the house before dropping into the chimney—especially around dusk—you may be seeing swifts rather than wall-nesting birds.

Never assume a chimney is empty before closing or screening it.

🪵 Can Woodpeckers Nest in House Walls?

Woodpeckers generally prefer trees for nesting, but they sometimes investigate houses.

Wooden siding can attract woodpeckers for several different reasons. A bird may be:

Drumming to communicate
Searching for insects
Investigating a possible cavity
Excavating into damaged or soft wood

Most woodpeckers do not routinely choose intact house walls as nest sites.

However, a woodpecker-created hole can lead to another problem. Once the opening exists, starlings, sparrows or other cavity nesters may move in.

The bird that made the hole may therefore be different from the bird eventually nesting inside it.

🏠 Why Do Birds Nest in House Walls?

Many birds that enter houses are cavity-nesting species.

In nature, these birds use protected spaces such as:

Hollow trees
Woodpecker holes
Rock crevices
Cliff cavities

Unfortunately, a gap in a house can look remarkably similar from a bird’s perspective.

A small entrance may lead into a warm, dark and protected chamber safe from rain and many predators.

Common entry points include:

Loose siding
Broken siding
Missing soffits
Gaps beneath eaves
Damaged fascia
Roof openings
Unscreened vents
Holes around utility cables
Openings around pipes
Deteriorated trim
Previous animal damage

The exterior hole may be surprisingly small compared with the cavity behind it.

🔊 What Does a Bird Nesting in a Wall Sound Like?

The noises depend partly on whether you are hearing an adult bird or nestlings.

Chirping

Frequent chirping is one of the strongest signs that chicks are present.

Young birds often become especially vocal when a parent approaches with food.

Scratching

You may hear light scratching as adults arrange nesting material or move around inside the cavity.

Fluttering

Rapid bursts of fluttering can occur as an adult enters or leaves through a tight opening.

Tapping

Hard repeated tapping may suggest a woodpecker rather than a bird merely occupying an existing cavity.

Loud movement

Larger birds such as starlings can sound surprisingly substantial when moving around behind a wall or soffit.

⏰ When Are Birds in Walls Most Active?

Birds are primarily active during daylight.

If the sounds begin around sunrise and continue intermittently throughout the day, birds become a strong possibility.

Parents feeding chicks may make repeated trips between the nest and feeding areas from early morning until evening.

Noises occurring almost entirely after dark may point toward another animal instead.

🐿️ Is It Actually a Bird?

Several animals can make scratching and movement noises inside houses.

Possible alternatives include:

Mice
Rats
Squirrels
Bats

The easiest way to confirm birds is often to locate the exterior entrance and watch it from a distance.

An active nest may reveal adults:

Entering and leaving repeatedly
Carrying insects
Carrying grass or feathers
Removing waste from the nest
Calling near the entrance

You do not need to approach the hole closely to identify the bird.

In fact, observing from farther away usually gives the adults more confidence to return.

🌱 When Do Birds Usually Nest in House Walls?

Most wall-nesting problems begin during spring and summer, when birds are searching for nest cavities and raising young.

Timing varies considerably by location and species.

Some birds may begin investigating potential nest sites weeks before eggs are laid.

If your home has an opening that birds used during the previous year, repairing it during the nonbreeding season is much easier than dealing with an active nest later.

⚖️ Can You Remove a Bird Nest From a House Wall?

This depends heavily on the species and whether the nest is active.

Many native birds in the United States are protected under the Migratory Bird Treaty Act. Removing or disturbing an active nest containing eggs or young may therefore be illegal without appropriate authorization.

The legal situation is different for some introduced species, including House Sparrows and European Starlings, which are not federally protected under the Migratory Bird Treaty Act.

Identification matters.

You should never automatically assume that a bird inside a wall is a House Sparrow or starling simply because those species frequently use buildings.

If you are unsure what species is nesting there, contact an appropriate wildlife authority or licensed wildlife professional before disturbing an active nest.

🚫 Never Seal an Active Entrance

One of the biggest mistakes homeowners make is plugging the opening as soon as they discover it.

An empty-looking hole does not mean an empty nest.

The adult bird may simply be away collecting food.

Sealing the entrance could trap:

A nesting adult
Eggs
Newly hatched chicks
Older nestlings unable to escape

This creates an animal-welfare problem and can eventually cause odors, insects and other issues inside the wall.

Determine whether the cavity is active before closing it.

👀 How to Find the Entrance Hole

You may be able to locate the nest without opening a wall.

Walk around the exterior of the house and look for:

Birds repeatedly landing in one location
Grass or feathers protruding from a gap
Droppings below an opening
Damaged siding
Broken soffits
Open vents
Gaps along the roofline
Loose trim
Holes under eaves

Then watch the suspected entrance quietly from a distance.

If adults are feeding nestlings, you may see them return frequently with insects or other food.

🛠️ How to Keep Birds From Nesting in Walls

Prevention is much easier when performed before nesting begins.

Once you have confirmed that no active nest remains and that closing the opening is legal, inspect the exterior of the house thoroughly.

Pay particular attention to:

Soffits
Fascia
Siding
Roof edges
Vents
Chimneys
Pipe openings
Utility penetrations
Areas previously damaged by woodpeckers

Small gaps should be repaired using materials appropriate for the structure.

Vents can often be protected with suitable screening while still allowing required airflow.

The goal is not to chase birds away repeatedly. It is to eliminate access to the cavity before another nesting attempt begins.

🪺 Give Native Cavity Nesters Somewhere Else to Go

If chickadees, wrens or swallows frequently investigate your home, consider adding a properly designed nest box elsewhere on the property.

Possible nest-box users include:

Chickadees
Wrens
Tree Swallows
Violet-green Swallows
Bluebirds
Purple Martins

Different species require different entrance-hole sizes, interior dimensions and placement.

Using a birdhouse specifically designed for your target species makes it more likely that native birds will use it.

Nest boxes can be especially valuable in neighborhoods where old trees, dead snags and natural cavities are scarce.

🧹 Should You Remove the Old Nest?

Once you are certain that nesting has finished, the birds have departed, and removal is lawful, old nesting material can usually be cleaned from an accessible portion of the structure before repairs are completed.

There are good reasons to do so.

Old nests may contain:

Feathers
Droppings
Insects
Mites
Organic debris

The most important step, however, is repairing the entrance.

Simply removing the nest while leaving the same opening available means another bird may discover the cavity and start the process again.

❓ Frequently Asked Questions

What bird is most likely nesting in my house wall?

House Sparrows and European Starlings are among the strongest possibilities across much of North America because both species commonly nest in human-made structures.

However, wrens, swallows and other cavity-nesting birds may also use buildings depending on your location.

What small brown bird nests inside house walls?

A House Sparrow or House Wren may be responsible. In some parts of western North America, Bewick’s Wrens are another possibility.

Watch the adult bird rather than identifying it solely from the sound.

What black bird nests in house walls?

European Starlings commonly nest inside building cavities. Adults appear dark and glossy, often with green and purple iridescence.

Do sparrows nest in walls?

Yes. House Sparrows commonly use holes in buildings, including cavities associated with walls, eaves and roofs.

Do wrens nest in house walls?

Wrens are enthusiastic cavity nesters and sometimes use nooks and crevices around human structures. House Wrens in particular are famous for selecting unusual nest sites.

Do chickadees nest inside walls?

Chickadees usually prefer tree cavities, soft decaying wood, old woodpecker holes and birdhouses. An accessible building cavity can occasionally attract them, but they are less typical wall nesters than starlings and House Sparrows.

Do birds nest in attics?

Yes. Birds may reach attics through damaged soffits, vents or roof openings. Larger accessible spaces can attract species that would not fit inside a narrow wall cavity.

What bird nests in chimneys?

Chimney Swifts are famous for using masonry chimneys in eastern North America. Vaux’s Swifts can use chimneys in western regions.

Why do I hear baby birds inside my wall?

If the sounds are high-pitched and especially active during daylight, you may be hearing nestlings begging for food whenever an adult approaches.

Watch the exterior of the house for adults carrying food into an opening.

How long will baby birds stay in the wall?

The length of the nestling period depends on the species. For many common cavity-nesting songbirds, young remain in the nest for roughly a couple of weeks, while some species stay considerably longer.

Correct identification provides the best estimate.

Can I cover the hole after the birds leave?

Yes, once you have confirmed that the cavity is genuinely inactive and there are no legal restrictions preventing the work.

Inspect carefully before sealing it because eggs or young can be hidden deep inside.

Will the birds come back next year?

They may.

A successful nest cavity can remain attractive during later breeding seasons, and even if the original pair does not return, another bird may discover it.

Repairing the entrance after nesting is finished is the best way to prevent recurrence.

🐦 Final Thoughts

When birds move into a house wall, they are usually responding to something very simple: the building contains a cavity that resembles a natural nest site.

House Sparrows and European Starlings are among the birds most strongly associated with these situations, but House Wrens, Bewick’s Wrens, Violet-green Swallows, chickadees and other cavity nesters may occasionally use openings around homes.

The best first step is identification.

Locate the exterior entrance, watch it quietly from a distance, and pay attention to the size and appearance of the adults. This can tell you much more than the noises coming through the drywall.

If the nest is active, don’t immediately seal the opening. Many native birds are legally protected, and blocking an active cavity can trap young birds inside.

Once nesting has genuinely ended, repairing the exterior opening is usually the most effective long-term solution—and a well-designed nest box nearby can provide native cavity nesters with a much better place to raise their next family.