Pileated woodpeckers nest in cavities they excavate in dead or dying trees, typically choosing large-diameter snags or decaying hardwood trees in mature forests. These impressive birds, the largest woodpeckers in North America (except for the possibly extinct ivory-billed), create a new nesting cavity almost every year, and their rectangular or oval holes are distinctive landmarks in the woods.
Nesting Habitat and Tree Selection
Pileated woodpeckers are habitat specialists when it comes to nesting. They require forests with an abundance of large, older trees, especially those with heartwood decay. This decay, often caused by fungi, makes it easier for the birds to excavate their cavities. They prefer:
- Dead or dying trees (snags) – standing dead wood is the primary nesting substrate.
- Large diameter trunks – typically at least 15-20 inches in diameter, though they may use smaller if necessary.
- Hardwood species – oaks, maples, and beeches are common choices, but they also use pines and other conifers in some regions.
- Mature or old-growth forests – these provide the necessary large trees and decay conditions.
In suburban areas, they may use large shade trees or utility poles, but they are less common there than in wilder forests.
Excavation Process and Timeline
Both male and female pileated woodpeckers participate in excavating the nest cavity, though the male often does more of the initial work. The process is physically demanding and can take 2-3 weeks. They chip out a cavity that is typically:
- Depth: 10-24 inches deep
- Entrance hole: 3-4 inches wide and 4-5 inches tall, often oval or rectangular
- Interior width: 6-8 inches
The entrance hole is often described as having a “freshly cut” appearance, with wood chips scattered at the base of the tree. Pileated woodpeckers do not reuse their nesting cavities, but they may use a different cavity for roosting in the winter.
Egg Laying and Incubation
Pileated woodpeckers typically lay their eggs in early spring, with timing varying by latitude. In the southern parts of their range, they may start as early as February, while in the north, they may wait until April or May. The clutch size is usually 3-5 eggs, which are white and oval. The female lays one egg per day, and incubation begins after the last egg is laid. Both parents incubate the eggs, with the male often taking the night shift. Incubation lasts about 15-18 days.
Chick Rearing and Fledging
After hatching, the chicks are altricial – blind, naked, and completely dependent on their parents. Both parents feed the young by regurgitating insects, primarily ants and beetle larvae. The chicks grow rapidly, and their calls become louder and more persistent as they get older. They fledge (leave the nest) at about 26-28 days after hatching. Even after fledging, the young may stay with their parents for several weeks, learning foraging skills.
Common Nesting Problems and Predators
Pileated woodpecker nests face several threats. The most significant natural predators include:
- Raccoons – they can reach into cavities and pull out eggs or chicks.
- Snakes – rat snakes and other climbing snakes may enter the cavity.
- Hawks and owls – they may prey on adults or fledglings.
- Squirrels – they may compete for the cavity or eat eggs.
Human-related problems include habitat loss (removal of dead trees) and disturbance near the nest. If a nest is disturbed during incubation, the parents may abandon it.
Comparison with Other Woodpeckers
Pileated woodpecker nests are much larger than those of smaller woodpeckers like the downy or hairy woodpecker. The entrance hole of a pileated is roughly the size of a baseball, while a downy’s is about the size of a quarter. Unlike the red-headed woodpecker, which often nests in open areas, pileateds prefer deep forests. The pileated’s rectangular or oval entrance is also unique; most other woodpeckers make round holes.
Conservation and How to Help
Pileated woodpeckers are not currently threatened, but they are sensitive to forest fragmentation. To help them, property owners can:
- Leave dead or dying trees standing if they do not pose a safety hazard.
- Maintain mature forests with a mix of tree species.
- Install nest boxes – though pileateds rarely use them, they may if the box is large enough (about 12x12x24 inches) and placed 15-20 feet high.
- Avoid pesticides that reduce insect prey.
Frequently Asked Questions
Do pileated woodpeckers use the same nest every year?
No, they typically excavate a new cavity each year. They may use an old cavity for roosting, but for nesting they usually start fresh. This is why they need a continuous supply of suitable dead trees.
How can I tell if a hole is from a pileated woodpecker?
Look for a large, oval or rectangular hole, often 3-4 inches wide and 4-5 inches tall, with a deep cavity behind it. You’ll often see large wood chips at the base of the tree. The holes are usually in dead or dying trees, not in healthy live wood.
What time of year do pileated woodpeckers nest?
Most nesting activity occurs in early spring, typically from March to June depending on the region. They lay eggs in April or May in most of North America.
Are pileated woodpeckers destructive to houses?
They can be, but they rarely peck on houses unless there is a food source (like carpenter ants) or if they are drumming to attract a mate. If they are damaging your home, it’s best to exclude them with netting or noise deterrents, and address any insect infestations.
Do pileated woodpeckers migrate?
No, they are year-round residents throughout their range. They do not migrate, but they may move to different areas if food becomes scarce.
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