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How Far Apart Should Birdhouses Be? It Depends on Species

Most songbirds want 100 to 200 feet between boxes, but bluebirds pair at 15 feet and martins nest in colonies. Spacing is a territory question.

By Zakaria 2 min read Save to Pinterest — opens Pinterest in a new tab
A weathered wooden nest box on a pole against clear sky, with a perch below the entrance hole
Photo: Magda Ehlers, Pexels License, via Pexels
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100 to 200 feet for most songbirds — because spacing is really a territory question, not a tidiness one. But the exceptions are large enough to matter: bluebirds get paired at 15 feet, and martins want boxes grouped together.

Spacing by species

Same-species spacing
SpeciesSpacing
Most songbirds (chickadee, titmouse, wren, nuthatch)100–200 ft
BluebirdPaired at 10–20 ft, pairs 100+ ft apart
Purple martinGrouped — colonial
Different speciesMuch closer is fine

The bluebird pairing trick

Two boxes close together, on purpose

Tree swallows compete with bluebirds for boxes. Put two boxes 10 to 20 feet apart and a swallow pair claims one — then defends the area against other swallows, leaving the second box free for bluebirds.

You are recruiting one competitor to exclude the rest.

Why more boxes is not more birds

In a typical quarter-acre garden: realistically one or two boxes per species, plus boxes for different species elsewhere.

Six boxes does not produce six nesting pairs. It produces one or two occupied and four ignored. Fewer boxes, well sited and properly spaced, consistently do better.

If a box goes unused

Spacing is only one cause. Check the others:

  • Hole size wrong for the target species
  • Wrong mounting height
  • Too much sun on the box
  • No clear flight path to the entrance
  • A perch below the hole — this mainly helps predators
  • Reachable by a cat

A box empty in its first season is normal

Birds often prospect one year and occupy the next. Leave it up.

Which way to face it

  • Away from prevailing wind and driving rain
  • Away from full afternoon sun — a hole facing a hot west afternoon can overheat nestlings
  • In practice, somewhere between north and east in most of the northern hemisphere
  • A slight downward tilt keeps rain out of the entrance

The two that break the rules

  • Hummingbirds do not use nest boxes at all. They build tiny open cup nests on branches
  • Purple martins want multiple compartments grouped in one unit, in the open, 30 to 120 feet from human housing and well away from tall trees

Applying songbird spacing to martins is a common reason martin housing stays empty.

Common questions

How far apart should birdhouses be?

For most cavity-nesting songbirds, 100 to 200 feet between boxes intended for the same species, because they defend a feeding territory around the nest and will not tolerate a rival close by. Boxes meant for different species can go much closer, since the territorial conflict is mainly within a species. The exceptions matter: purple martins nest colonially and want boxes grouped, and bluebirds are paired deliberately in a way described below.

Can you put two birdhouses close together?

Yes, if they are for different species or if you are pairing deliberately. Two boxes for the same songbird species within sight of each other usually results in one being used and the other ignored, or in fighting. Two boxes 10 to 20 feet apart is a recognised technique for bluebirds specifically — tree swallows will claim one and then defend the area against other swallows, leaving the second free for a bluebird pair.

How many birdhouses can one yard support?

In a typical quarter-acre suburban garden, realistically one or two boxes for any given species, plus boxes for different species elsewhere on the plot. Putting up six boxes does not produce six nesting pairs; it usually produces one or two occupied boxes and four ignored ones. Fewer boxes, well sited and properly spaced, consistently outperform many boxes crowded together.

Why won't birds use my birdhouse?

Spacing is one cause among several. The others are hole size wrong for the target species, wrong mounting height, too much sun on the box, no clear flight path to the entrance, a perch below the hole which mainly helps predators, and siting it where a cat can reach. Boxes also often go unused simply in their first season — birds prospect one year and occupy the next, so a box that sat empty is worth leaving up.

Which direction should a birdhouse face?

Generally away from prevailing wind and driving rain, and away from full afternoon sun, which in practice means facing somewhere between north and east in most of the northern hemisphere. Avoid a hole facing directly into a hot west-facing afternoon, which can overheat nestlings. A slight downward tilt helps keep rain out of the entrance.

Does spacing matter for hummingbirds or purple martins?

Hummingbirds do not use nest boxes at all — they build tiny open cup nests on branches, so no spacing applies. Purple martins are the opposite of most songbirds: they are colonial and want multiple compartments grouped in one housing unit, placed in the open 30 to 120 feet from human housing and well away from tall trees. Applying songbird spacing rules to martins is why martin housing often stays empty.

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