Can a Woodpecker Kill a Tree? Usually It Is a Symptom

Woodpeckers rarely kill healthy trees — they are hunting insects already inside. Where sapsuckers are the exception, and when the damage matters.

By The Grow In Backyard Team September 15, 2026 3 min read Save to Pinterest

Rows of woodpecker holes in the trunk of a red pine — Photo: U.S. Fish and Wildlife Service - Midwest Region, Public domain, via Wikimedia Commons

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Mostly no — and the holes are usually telling you something rather than doing the damage. A woodpecker excavating a trunk is following insects that are already in the wood.

There is one genuine exception, and it is worth being able to recognise.

Read the holes

Three kinds of woodpecker activity

Pattern	What it is	Concern
Irregular, scattered, varying depth	Feeding — following larvae	The insects are the problem
Neat horizontal rows, evenly spaced	Sapsucker wells	Can girdle; worth acting on
One large round hole, 1.5–4 in	Nest cavity	Usually dead or soft wood
Rapid drumming, no hole	Territorial signalling	None — it is about sound

Drumming confuses people most. It is a communication signal, not excavation, and the bird chooses whatever is loudest — which is why gutters, flashing, aluminium siding and chimney caps get hammered at dawn in spring. It does no structural damage and stops when breeding season ends.

Why irregular holes are a message

A woodpecker working a trunk hard has found carpenter ants, bark beetles, or wood-boring larvae. Those insects generally colonise trees that are already stressed, damaged or dying.

So the sequence is: tree declines → insects move in → woodpecker follows.

Sustained woodpecker attention on one tree is worth an arborist’s opinion — not because of the bird, but because of what it is eating.

Sapsuckers, the real exception

Yellow-bellied sapsuckers drill rows of shallow wells in healthy trees and return repeatedly to keep the sap flowing, feeding on the sap and on insects it traps.

Favoured species: birch, maple, apple, mountain ash, pine.

The risk is girdling. If rows encircle a trunk or limb completely, they can sever the conductive tissue above that point. The wounds also admit fungal disease and attract other insects.

Even so, outright death is uncommon and usually needs repeated heavy attacks over several seasons, or a tree that was already struggling.

What to do

Wrap it. Burlap or hardware cloth around the affected section through the active season is the most reliable protection for a valued tree.

Visual deterrents — reflective tape, spinning devices, old CDs — work for a while. Birds habituate, so move them regularly.

Fix the real problem where it is insects: an arborist can identify the borer and say whether the tree is worth treating.

Never use sticky repellents

Sticky gels marketed for bird deterrence foul feathers and are frequently fatal — to woodpeckers and to any small bird that lands. They also trap bats and insects. Beyond the cruelty, woodpeckers are protected under the Migratory Bird Treaty Act in the US and equivalent law in Canada and Europe, and killing or harming one without a permit is an offence.

And what they are worth

A woodpecker working over a tree is eating carpenter ants and wood-boring larvae — the insects that damage timber, including timber in your house.

They also excavate the cavities that chickadees, nuthatches, bluebirds, wrens and small owls nest in afterwards. A garden that keeps a few standing dead limbs, safely sited, is doing more for local bird populations than most nest boxes achieve.

Common questions

Can a woodpecker kill a tree?

Most woodpeckers do not — they are excavating for insects that are already in the wood, so their presence usually indicates a tree that is already infested or declining rather than causing the decline. The exception is sapsuckers, which drill rows of holes in healthy trees to feed on sap and can girdle a trunk or branch if the rows encircle it. Even then, death is uncommon and takes repeated heavy attacks.

Why is a woodpecker pecking my tree?

Three reasons. Feeding — following insect larvae under the bark, which means the insects were there first. Excavating a nest cavity, usually in dead or soft wood. Or drumming, a rapid territorial signal that is about making noise rather than making a hole, which is why they choose resonant surfaces like gutters and siding. Feeding holes are irregular and scattered; sapsucker holes are neat rows.

What does sapsucker damage look like?

Neat horizontal rows of shallow holes, evenly spaced, often in bands around a trunk or large limb — quite unlike the irregular excavation of other woodpeckers. The bird returns to keep the wells flowing and feeds on sap and the insects it traps. Heavy repeated rows can girdle a stem, and the wounds are entry points for disease.

Should you worry about woodpecker holes in a tree?

Usually the holes are the message rather than the problem. Irregular excavation means wood-boring insects, and that is what to investigate — an arborist can say whether the tree is salvageable. Scattered feeding holes on a healthy tree are cosmetic. Neat rows from sapsuckers are worth protecting against if they encircle a trunk, particularly on young or already stressed trees.

How do you stop woodpeckers damaging a tree?

Wrap the affected section in burlap or hardware cloth during the active season, which is the most reliable method for sapsuckers. Visual deterrents — reflective tape, spinning objects — work for a while before the birds habituate. Do not use sticky repellents, which foul feathers and can be fatal to the bird and to anything else that lands. Woodpeckers are protected by law in the US, Canada and Europe.

Are woodpeckers protected?

Yes. In the United States they are covered by the Migratory Bird Treaty Act, and killing, capturing or harming one without a permit is a federal offence. Similar protections apply in Canada and across Europe. This means deterrence and exclusion are the only legal options, and it is worth knowing before reaching for anything more direct.

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A woodcrete nest box fixed to a tree trunk, its round entrance hole clearly visible

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