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Species Profile

Ivory-billed woodpecker

Campephilus principalis

The legendary "ghost bird" of swamps
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Ivory-billed woodpecker Distribution

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Found in 16 locations

Ivorybill Woodpecker, Animal, Animal Wildlife, Beak, Bird

At a Glance

Wild Species
Also Known As Lord God Bird, Lord Godbird
Diet Insectivore
Activity Diurnal+
Lifespan 12 years
Weight 0.57 lbs
Status Critically Endangered
Did You Know?

One of North America's largest woodpeckers: 48-53 cm long with a 76-80 cm wingspan; adults ~0.45-0.57 kg.

Scientific Classification

A very large North American woodpecker historically associated with extensive bottomland hardwood forests; famous for its presumed extinction and intermittent, controversial modern sight reports.

Kingdom
Animalia
Phylum
Chordata
Class
Aves
Order
Piciformes
Family
Picidae
Genus
Campephilus
Species
Campephilus principalis

Distinguishing Features

  • Large black-and-white woodpecker with extensive white on the trailing edge of the wings (prominent in flight)
  • Ivory-colored bill (pale, horn-like)
  • Male with a red crest; female with a black crest
  • Preference for scaling bark from large dead/dying trees to access beetle larvae

Physical Measurements

Length
1 ft 8 in (1 ft 7 in – 1 ft 9 in)
Weight
1 lbs (1 lbs – 1 lbs)
Top Speed
25 mph
Estimated, not measured top speed

Appearance

Primary Colors
Black White Cream
Secondary Colors
Red Striped
Skin Type Feathered (contour feathers with stiffened tail rectrices typical of woodpeckers; zygodactyl feet adapted for vertical climbing).
Distinctive Features
  • Very large woodpecker: total length commonly cited ~48-53 cm with long neck and large head; among the largest North American Picidae (Tanner 1942; Birds of the World).
  • Bill notably long, chisel-like, and pale ivory/cream; contrasts with the typically darker bill of Pileated Woodpecker (Dryocopus pileatus).
  • Upperwing pattern diagnostic in classic field marks: extensive white on the wings visible on the upperwing in flight/perched, producing a striking black-and-white 'flash' (frequently emphasized in identification literature distinguishing it from Pileated).
  • Crest shape tall and swept-back; crest color is sex-dependent (male red; female black).
  • Large, stiff tail used as a prop while climbing; feet zygodactyl (two toes forward, two back) for clinging to trunks.
  • Historically, Ivory-billed Woodpeckers scaled bark from large dead or dying trees to reach wood‑boring beetle larvae. They lived in old-growth bottomland hardwood swamps with many large standing dead trees and dead timber.
  • Ivory-billed Woodpecker (Campephilus principalis): likely extinct; IUCN lists Critically Endangered (Possibly Extinct). Modern sightings are debated and unconfirmed; people look at wing pattern, bill color, and crest sex differences vs Pileated.

Sexual Dimorphism

Sexes are similar in size and overall black-and-white pattern, but differ strongly in crest color (a key field mark).

♂
  • Crest bright red (male's most diagnostic sex-specific mark).
  • Same black-and-white body pattern and pale ivory/cream bill as female.
♀
  • Crest black (lacks red; key distinction from adult male).
  • Same black-and-white body pattern and pale ivory/cream bill as male.

Did You Know?

One of North America's largest woodpeckers: 48-53 cm long with a 76-80 cm wingspan; adults ~0.45-0.57 kg.

Key ID vs Pileated Woodpecker: ivory-colored bill (not dark), and in flight the white is on the trailing edge/secondaries so the back of the wing looks mostly white.

Sexes differ in crest color: male has a red crest; female's crest is black (both have a bold white neck stripe).

Classic foraging sign is "bark scaling"-large sheets of bark pried off dead/dying trees to reach big beetle larvae.

Field reports often cite the distinctive "double-knock" display (two rapid, loud blows) associated with Campephilus woodpeckers.

In the Singer Tract (Louisiana), James T. Tanner (1942) estimated very large space needs-about ~6.5 km² per pair-reflecting reliance on extensive old-growth swamp forest.

Its conservation story helped shape modern North American bird conservation debates: habitat loss, last verified U.S. populations, and controversial 21st-century sight claims.

Unique Adaptations

  • Exceptionally robust, chisel-like bill and reinforced skull/neck musculature for heavy excavation and prying bark from large trees.
  • Zygodactyl feet (two toes forward, two back) plus stiffened tail feathers form a tripod brace for powerful vertical climbing-classic Picidae anatomy scaled up for a very large bird.
  • Foraging specialization toward large-diameter dead/dying wood and bark-scaling expands access to large beetle larvae not easily reached by smaller woodpeckers.
  • High contrast black-and-white wing pattern functions as a long-distance visual signal in dense swamp forests, aiding mate/pair coordination.

Interesting Behaviors

  • Bark-scaling foraging: targets recently dead or dying trees (especially large trunks/limbs), levering off bark to expose wood-boring beetle larvae.
  • Powerful, bounding flight through swamp corridors; observers historically noted extensive white on the rear of the wings during flight.
  • Territorial advertising with loud drumming and the famed "double-knock" pattern; pairs historically maintained large, resource-based home ranges (Tanner 1942).
  • Cavity nesting in large, decaying trees typical of old-growth bottomland forests; both sexes participate in excavation, defense, and provisioning (as in other large Picidae).
  • Strong association with mature bottomland hardwood swamps-river floodplains, cypress-tupelo systems, and forests with abundant large deadwood (snags) and natural disturbance gaps.

Cultural Significance

The Ivory-billed Woodpecker (Campephilus principalis) is a symbol of old-growth bottomland hardwood forests and wonder, nicknamed the Lord God Bird. Its status is uncertain: IUCN Critically Endangered (Possibly Extinct) and listed under the U.S. Endangered Species Act.

Myths & Legends

"Lord God Bird" (Southern U.S. folk name): hunters and swamp travelers reportedly exclaimed "Lord God, what a bird!" on seeing it-an oral-tradition naming story that turned the species into a near-mythic marvel of the bottomlands.

In parts of the Southeast, the Ivory-billed Woodpecker (Campephilus principalis) is called a "ghost bird"—heard as distant knocks or seen as a flash of white, a wild sign possibly hiding in remote cypress swamps.

"The bird that won't die": repeated, questioned 20th and 21st century reports of the Ivory-billed Woodpecker (Campephilus principalis) in large southern river swamps made a local wildlife story of unlikely survival.

Audubon-era stories and naturalists' dramatic tales of the Ivory-billed Woodpecker (Campephilus principalis) — its size and rarity in huge southern forests — made it a legendary 'lost' species tied to the old-growth South.

Conservation Status

CR Critically Endangered (Possibly Extinct)

Facing an extremely high risk of extinction in the wild.

Population Decreasing

Protected Under

  • United States: Listed as Endangered under the U.S. Endangered Species Act (ESA).
  • United States: Protected under the Migratory Bird Treaty Act (MBTA) as a native migratory bird species (prohibits take/possession).

Life Cycle

Birth 3 chicks
Lifespan 12 years

Lifespan

In the Wild
6–20 years

Reproduction

Mating System Monogamy
Social Structure Socially Monogamous
Breeding Pattern Long Term
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Ivory-billed Woodpecker (Campephilus principalis) formed territorial, socially monogamous breeding pairs. Male and female shared a cavity nest; both sat on eggs and fed the young. Clutch usually 2–3 eggs (1–4). No helpers; genetic monogamy untested.

Behavior & Ecology

Social Pair Group: 2
Activity Diurnal, Matutinal, Vespertine
Diet Insectivore Large wood-boring beetle larvae (especially longhorn beetle larvae) taken from beneath bark on recently dead/dying trees

Temperament

Wary and difficult to approach; historical accounts consistently describe strong avoidance of humans and rapid retreat when disturbed (Tanner 1942; Jackson 2002).
Territorial: pairs defend extensive foraging areas in mature bottomland hardwood forest; aggression primarily expressed via chases, calling, and display/drumming rather than sustained physical combat (Tanner 1942).
Generally non-gregarious (not flocking); social tolerance highest within mated pairs and parent-offspring groups during the breeding season (Tanner 1942).

Communication

Characteristic nasal 'kent'/'kient' contact call Described in detail by Tanner 1942; discussed and compared to nuthatch calls in Fitzpatrick et al. 2005; Jackson 2002
Series of 'kent' notes used in contact and agitation contexts; juveniles give higher-pitched begging calls while following adults Tanner 1942
Double-knock Two rapid, resonant blows) used as a long-distance signal; treated as a key non-vocal communication cue in historical descriptions and modern reviews (Tanner 1942; Jackson 2002; Fitzpatrick et al. 2005
Drumming/bill-tapping on resonant substrates Non-song mechanical signaling typical of woodpeckers; Ivory-billed reports emphasize powerful knocks rather than long drum-rolls) (Tanner 1942; Jackson 2002
Visual displays and flight cues during territorial interactions E.g., bounding/chasing flights, conspicuous wing flashes), consistent with display repertoires described for Campephilus woodpeckers; intensity varies with breeding stage and intrusion pressure (Tanner 1942; Jackson 2002

Habitat

Forest Deciduous Forest Swamp Wetland River/Stream Coniferous Forest
Biomes:
Temperate Forest Wetland Tropical Dry Forest
Terrain:
Plains Valley Coastal Riverine Muddy
Elevation: Up to 2624 ft 8 in

Ecological Role

Specialist predator of wood-inhabiting insects and an ecosystem engineer via bark-scaling and cavity excavation in mature bottomland forests

suppression of populations of wood-boring insects in stressed/dead trees facilitates wood decomposition processes by exposing inner bark/wood and insect galleries creates large cavities (nest/roost sites) that can be used by secondary cavity-nesting wildlife

Diet Details

Main Prey:
Wood-boring beetle larvae Bark beetles and ambrosia beetles Ants Termites Wood-boring insect larvae
Other Foods:
Mast and nuts Wild fruits and berries

Human Interaction

Domestication Status

Wild

Ivory-billed Woodpecker (Campephilus principalis): never domesticated. Humans harmed it by logging and draining bottomland forests and by collecting birds for museums in the 1800s–early 1900s. It is legally protected and well known as a likely lost species, prompting searches and habitat work. Woodpeckers need dead trees, make cavities for other animals, and help scientists check forest health.

Danger Level

Low
  • Physical injury: low but possible minor puncture/laceration if a bird were handled at close range (strong bill; defensive pecking possible)
  • Zoonotic disease risk: low and nonspecific; as with wild birds generally, potential exposure to ectoparasites or pathogens exists primarily through handling carcasses/feathers without precautions
  • Field hazards are primarily environmental (e.g., remote swamp travel) rather than posed by the bird itself

As a Pet

Not Suitable as Pet

Legality: Ivory-billed Woodpecker (Campephilus principalis) cannot be kept as a pet in the U.S.; it is protected by the MBTA and ESA. Catching, moving, or selling it needs federal permits for science or education; similar bans apply across its historic range.

Care Level: Expert Only

Purchase Cost:
Lifetime Cost:

Economic Value

Uses:
Conservation and habitat protection funding catalyst Ecotourism/birding interest (historical and search-related) Scientific research value (biodiversity monitoring, extinction dynamics, habitat ecology) Cultural/educational value (iconic species in conservation history)
Products:
  • Non-consumptive: wildlife viewing/search expeditions and associated local spending (where pursued)
  • Non-consumptive: educational materials, documentaries, museum/scientific reference value

Relationships

Predators 6

Great Horned Owl Bubo virginianus
Barred Owl
Barred Owl Strix varia
Cooper's Hawk
Cooper's Hawk Accipiter cooperii
Red-shouldered Hawk
Red-shouldered Hawk Buteo lineatus
Raccoon
Raccoon Procyon lotor
Eastern Ratsnake
Eastern Ratsnake Pantherophis alleghaniensis

Related Species 8

Imperial Woodpecker Campephilus imperialis Shared Genus
Magellanic Woodpecker Campephilus magellanicus Shared Genus
Crimson-crested Woodpecker Campephilus melanoleucos Shared Genus
Guayaquil Woodpecker Campephilus gayaquilensis Shared Genus
Robust Woodpecker Campephilus robustus Shared Genus
Red-necked Woodpecker Campephilus rubricollis Shared Genus
Lineated Woodpecker Dryocopus lineatus Shared Family
Pileated Woodpecker
Pileated Woodpecker Dryocopus pileatus Shared Family

Ecological Equivalents 5

Animals that fill a similar ecological role in their ecosystem

Pileated Woodpecker
Pileated Woodpecker Dryocopus pileatus Closest modern similar woodpecker is very large, nests in cavities, and forages for insects in dead or dying wood, creating large holes. Both use mature forests, but the Ivory-billed (Campephilus principalis) favored bottomland hardwoods and old-growth.
Imperial Woodpecker Campephilus imperialis Very similar niche and behavior within the same genus: a giant Campephilus woodpecker historically tied to large, mature forests and large-diameter dead timber. Frequently compared to the Ivory-billed Woodpecker for bark-scaling foraging and dependence on extensive, intact habitat.
Magellanic Woodpecker Campephilus magellanicus Large Campephilus woodpecker of southern beech/temperate forests. Comparable in foraging mechanics (heavy excavation and scaling of dead wood) and in reliance on mature forest structure, serving as a functional ecological counterpart outside North America.
White-headed Woodpecker Dryobates albolarvatus Specializes in foraging in mature conifer systems, with an emphasis on wood-boring insects in dead or declining trees. Although smaller and occupying different forest types, it similarly relies on standing dead wood and large-tree structure.
Black-backed Woodpecker Picoides arcticus A dead-wood specialist strongly associated with recently killed trees and outbreaks of wood-boring beetles. Parallels the Ivory-billed Woodpecker's reported emphasis on recently dead timber as a source of beetle larvae, though the Black-backed typically occurs in post-fire/boreal settings rather than bottomland hardwoods.

Quick Take

  • Achieving 21 inches in length, this species requires extensive habitat to sustain its massive size.
  • The Campephilus scientific name identifies a dietary restriction that complicates survival in unstable forests.
  • Paradoxically, these enormous birds show zero aggression toward other members of the same species.
  • Constructing new cavities in January is a mandatory step before the mating cycle begins.

Possibly extinct, this iconic species has inspired people to comb the forests and swamps of the south in search of signs for it, since the last widely accepted sighting in the United States occurred in 2004, and in Cuba in 1987. Back when it was still common, the ivory-billed woodpecker was considered to be a top ecosystem engineer. Their long, sharp beaks enabled them to drill cavities in trees, creating homes not only for themselves but also for other species.

A detailed wildlife infographic about the Ivory-billed Woodpecker featuring bird illustrations, habitat maps, and data points on its size, behavior, and extinction risks.
It was the architect of the southern swamps until it vanished into legend. Discover the specialized survival traits of the massive 'Lord God Bird' and why the search for this ghost species continues today. © A-Z Animals

3 Ivory-Billed Woodpecker Amazing Facts

  • Woodpeckers make distinctive sounds as they chisel into trees. Experts can even distinguish between different species by the sounds they make by their burrowing.
  • This species has tufts of white feathers around its nostrils to keep out debris while it’s drilling into wood.
  • The ivory-billed woodpecker is a sedentary species (meaning it rarely travels far from its home), but some experts have suggested that it may move occasionally from place to place to take advantage of newly dead trees.

Where to Find the Ivory-Billed Woodpecker

The ivory-billed woodpecker was once found across most of the southeastern United States and Cuba. Its preferred habitat is extensive forests with a constant supply of dead or dying trees from fires, floods, or hurricanes. It relies on these trees for both food and habitation.

Nests

The ivory-billed woodpecker creates a nest by excavating tree cavities with their sharp beak. It’s believed that they create new nests every year just in time for the mating season. Pines, red maples, bald cypresses, and sugarberries are all considered to be suitable nesting sites.

Classification and Scientific Name

The scientific name of the ivory-billed woodpecker is Campephilus principalis. The genus name Campephilus is formed from the combination of two Greek words that roughly mean caterpillar-loving. Principalis is a Latin word meaning “original” or “first in importance,” perhaps referring to the enormous size of this species. There are two recognized subspecies, the American and the Cuban ivory-billed woodpecker.

Size, Appearance, and Behavior

The ivory-billed woodpecker is characterized by its long ivory-colored bill, its curved black claws, and a large crest at the back of the head. The bird is covered in a glossy black plumage with white stripes running from the wings to the side of the head. The innermost wing feathers are also colored white; this is particularly prominent when the wings are folded against the back. Measuring between 19 and 21 inches long, this bird is the single-largest woodpecker in the entire United States. Males tend to be slightly larger than females overall. Their crest is also colored red instead of black.

The entire life of the ivory-billed woodpecker seems to depend entirely on forests. All of its foraging, roosting, and mating behavior takes place in and around trees. Each mated pair probably maintains its own separate home range, but the woodpecker is not defensive and territorial, as it shows little aggression toward members of the same species. While it’s not social, per se, it has been observed congregating in groups of three or four birds at once.

The ivory-billed woodpecker spends most of its day foraging for food. The peak of their activity occurs in the morning hours when they emerge from the hole to preen and call for mates. Their activity recedes slightly in the midday and then picks up again toward the evening. When nighttime arrives, they roost in separate cavities. The ivory-billed woodpecker is not known to be migratory; it probably roams no more than a few miles away from its home nest.

Ivory billed wood pecker

Illustration of the Ivory-Billed Woodpecker.

©Leo's Book Club/Shutterstock.com

Diet

The ivory-billed woodpecker is an omnivorous species. Foraging mostly takes place on tree trunks, fallen logs, or sometimes even the ground.

What does the ivory-billed woodpecker eat?

The ivory-billed woodpecker consumes berries, nuts, seeds, termites, beetles, and other insects. The bird finds its favorite food, the beetle larva, by stripping away the bark of dead or dying trees.

Predators, Threats, and Conservation Status

Despite the absence of confirmed sightings, these woodpeckers are still listed as a critically endangered species by the IUCN Red List. Since its entire existence is dependent on dense tree cover, deforestation had a calamitous impact on this bird’s population numbers.

What eats the ivory-billed woodpecker?

There are very few documented records of this woodpecker ever being preyed upon by other animals, but based on our understanding of closely related woodpecker species, it was probably eaten by raccoons, snakes, owls, crows, and hawks. Most predators would have preyed upon eggs and juveniles, but a large bird of prey could have taken on a full-grown woodpecker.

Reproduction, Young, and Molting

There is unfortunately not a whole lot of information about the woodpecker’s reproductive habits. Based on the limited data available, it’s assumed that this species began building a nest in January and then laid a clutch of up to six eggs in February or later. The chicks were incubated by the parents for about two weeks and then took another five weeks to grow their full-flight feathers. The relationship between a chick and its parents can last more than a year, even after it has learned how to forage on its own. The lifespan of this species is unknown, but some speculate it could live around 20 years.

Population

The IUCN estimates that there are between 1 and 49 of these woodpeckers in the wild. After decades of decline in the 19th and early 20th centuries, this species was considered to be functionally extinct, both in the wild and in captivity, but hope remains alive that it will eventually be rediscovered in the forested swamps of Cuba, Louisiana, Arkansas, or Florida. Based on unconfirmed sightings, its status was eventually raised to critically endangered.

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Sources

  1. Animal Diversity Web / Accessed June 25, 2021
  2. Audubon / Accessed June 25, 2021
A-Z Animals Staff

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Ivory-billed woodpecker FAQs (Frequently Asked Questions)

No, the ivory-billed woodpecker is not a migratory species. It stays largely within the same range year after year.

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