Foraging Pileated woodpeckers often chip out large and roughly rectangular holes in trees while searching out insects, especially ant colonies. They may also forage around the sides of human homes, cars, and suet-type feeders. Although they are less likely feeder visitors than smaller woodpeckers, pileateds may regularly be attracted to them in areas experiencing harsh winter conditions.
Breeding behavior Pileated woodpeckers engage in many courtship displays such as drumming, bill waving and "woick" calls to try to get a mate or to communicate with a pre-existing one. Once the birds have found a mate, they typically stay together for life. In early spring, the woodpecker pair begins to make the hole, and work continues on it throughout the season. The cavity is unlined except for wood chips. During the process of picking the nest site and making the hole, the pair uses tapping as a primary form of communication. Sometimes, pileated woodpeckers start making a nest, then abandon it and build a new nest elsewhere, but this spot can be revisited in the future to finish creating the nest. both parents incubate them for 12 to 16 days. The average clutch size is four per nest. The young may take a month to fledge. Once the brood is raised, the birds abandon the hole and do not use it as a nesting site the next year, especially since most nesting sites are built in places structurally unfit for another breeding season. However, if this does not happen, these holes—made similarly by all woodpeckers—provide good homes in future years for many forest songbirds and a wide variety of other animals. Owls and tree-nesting ducks may largely rely on holes made by pileateds to lay their nests. Even mammals such as raccoons may use them. Other woodpeckers and smaller birds, such as wrens, may be attracted to pileated holes to feed on the insects found in them. Ecologically, the entire woodpecker family is important to the well-being of many other bird species.
Territorial behavior A pileated woodpecker pair stays together on its territory all year round and is not migratory. They defend the territory in all seasons, but tolerate floaters during the winter. When defending their nest from either rival
conspecifics or from other species, the female is more involved.
Predation Predators at the nest can include
American and
Pacific martens,
weasels,
squirrels,
rat snakes, and
gray foxes. These predators usually wait for the woodpeckers to leave the nest and attack the nestlings or try to trap the birds and/or the nestlings in the nest. The woodpecker usually uses intimidation displays involving rapid head motions and wing flapping, and if those failed, then would try to strike the attacker with its bill. The woodpecker may choose to relocate the nest after an encounter like this to avoid repeat attacks from the same predator. Free-flying adults have fewer predators, but can be taken in some numbers by
Cooper's hawks,
northern goshawks,
red-shouldered hawks,
red-tailed hawks,
great horned owls,
bald eagles,
golden eagles, and
barred owls. These birds of prey attempt to ambush the woodpecker mid-flight to catch it by surprise and to minimize the threat of being hit by the woodpecker's powerful bill. Additionally, the woodpecker can fly in unpredictable patterns to evade capture or can use its beak to fend off these birds. ==Status==