The Drill with Feathers: Costa Rica’s Woodpeckers

They strike wood up to 20 times per second, withstand forces of up to 1,400 G, and build the homes that shelter dozens of other species. Woodpeckers are, without exaggeration, the most important engineers of the tropical forest.

An Ancient Order with Nine Families

To understand woodpeckers, you first need to know the evolutionary neighborhood they inhabit.

Woodpeckers belong to the order Piciformes, a predominantly arboreal group of birds that arose some 50 million years ago during the Eocene, and today encompasses nine families and around 400 species distributed across almost the entire world. The order’s name points directly to the trait that unifies them: picus in Latin means “woodpecker,” and it is the axis around which all the group’s diversity revolves.

The nine families of the order include names familiar to any birdwatcher in Costa Rica: tucans and toucanets (Ramphastidae), jacamars (Galbulidae), puffbirds (Bucconidae), and barbets (Capitonidae), in addition to the woodpeckers proper (Picidae). All share a striking anatomical feature: zygodactyl feet, with two toes pointing forward and two backward, giving them exceptional grip on vertical surfaces. They also all tend to nest in cavities, though with different strategies.

Within the order, the family Picidae is by far the most diverse: it encompasses more than 230 species across 35 genera, distributed on every continent except Australia, New Zealand, and the polar regions. They are, in that sense, one of the most evolutionarily and ecologically successful bird families on the planet.

Costa Rica’s Woodpeckers

Costa Rica records 16 species of woodpeckers, distributed across six genera representing remarkably distinct life strategies. Fifteen are permanent residents; only one — the Yellow-bellied Sapsucker — arrives as a migratory visitor from North America.

Genus Campephilus and Dryocopus

These are the most imposing woodpeckers. Two species inhabit Costa Rica:

• The **Pale-billed Woodpecker* (Campephilus guatemalensis*) is the largest in the country, reaching 38 cm. Unmistakable: the male has an entirely red head; the female shows a black crest at the center of her forehead. Both sexes sport two white stripes on the back that at rest form a “V” over the dark mantle. It ranges from Mexico to western Panama, and in Costa Rica inhabits humid forests on both slopes.

Pale-billed Woodpecker, photo by Fabio Araya.

• The **Lineated Woodpecker* (Dryocopus lineatus*) measures about 33 cm and is the most frequently encountered woodpecker in the country’s tropical and subtropical forests. Its pointed red crest, black-and-white striped face, and characteristic resonant call make it a hard-to-miss presence in any forest.

A Male Lineated Woodpecker

Genus Melanerpes: The Versatile Group

Melanerpes woodpeckers are medium-sized, with black-and-white barred backs and striking color details on the head. They are the most adaptable of the group and the most easily observed at forest edges, gardens, and peri-urban areas. Costa Rica has five species:

• The **Hoffmann’s Woodpecker (Melanerpes hoffmannii) deserves special mention. It is a Central American endemic** whose southern distribution limit falls in Costa Rica, and it is the most common woodpecker in the Central Valley, the dry Pacific, and highland zones up to 2,100 meters. The male has a brilliant red crown and a yellow or orange nape; the female lacks the red crown.

Hoffman’s Woodpecker, female. Photo by: Fabio Araya

• The **Golden-naped Woodpecker (Melanerpes chrysauchen) is nearly endemic to Pacific Costa Rica and the far west of Panama, with an unmistakable golden nape and forehead. The Red-crowned Woodpecker* (Melanerpes rubricapillus) — also called nuquirojo* (red-naped) in popular usage — inhabits the Caribbean and southern Pacific lowlands, with a striking red crown in the male and a red-only nape in the female.
• The **Acorn Woodpecker* (Melanerpes formicivorus*) is unmistakable: black-and-white plumage with a red crown and a clown-like face that gives it its popular name. It measures between 21 and 24 cm. What sets it apart from all other woodpeckers in the country is its social behavior: it lives in family groups of up to 16 individuals that share territory and nesting sites.

Accorn Woodpecker. Photo by Fabio Araya

• The **Black-cheeked Woodpecker (Melanerpes pucherani) measures between 17 and 19 cm and is immediately identified by the wide black mask covering its face and cheeks, framed by a golden-yellow forehead and red crown. It is loud and frequently observed in family groups foraging in the mid and upper canopy. In Costa Rica it inhabits the humid forests of the Caribbean lowlands and foothills**, generally up to 800 meters.
• The **Red-crowned Woodpecker (Melanerpes rubricapillus) is a medium-sized species with a black-and-white barred back and creamy orange underparts. It inhabits a wide range of open environments, forest edges, gardens, and peri-urban areas, and in Pacific Costa Rica hybridizes extensively with Hoffmann’s Woodpecker — hybrids show an intermediate orange nape and belly. It is distributed across the Caribbean and southern Pacific lowlands**.

Genera Piculus and Celeus

The genus Piculus contributes one resident species. The **Rufous-winged Woodpecker* (Piculus simplex*), with its unmistakable cinnamon-rufous wings visible in flight, prefers humid lowland forests on both slopes up to 900 meters.

The genus Celeus has two species in Costa Rica. The **Cinnamon Woodpecker (Celeus loricatus), cinnamon-colored with a yellowish crest, is one of the most elegant and elusive woodpeckers of Caribbean and southern Pacific lowlands. The [Chestnut-colored Woodpecker](https://ebird.org/species/chcwoo1)* (Celeus castaneus*) — uniformly chestnut with a showy yellow crest — inhabits Caribbean forests north to Honduras.

A beautiful male Cinnamon Woodpecker. Photo by Fabio Araya

Genera Colaptes, Veniliornis / Dryobates

The **Golden-olive Woodpecker* (Colaptes rubiginosus*) has the unusual habit of regularly descending to the ground to forage for ants and termites. It inhabits forests from lowland elevations to the high zones of both cordilleras.

The genus Veniliornis — smaller and with barred plumage — includes the **Red-rumped Woodpecker* (Veniliornis kirkii*), with its striking red rump, a resident of humid forests on the Caribbean and southern Pacific slopes.

The genus Dryobates includes the **Smoky-brown Woodpecker* (Dryobates fumigatus*), with uniformly dark brown plumage, a resident of forests on both slopes.

Genus Leuconotopicus

• The **Hairy Woodpecker* (Leuconotopicus villosus*), present in the high zones of the cordilleras, is distinguished from northern subspecies by being smaller and darker in coloration.

The Only Migratory Species

The **Yellow-bellied Sapsucker* (Sphyrapicus varius*) is the only migratory woodpecker in Costa Rica. It arrives from the boreal forests of Canada and the northeastern United States during the boreal winter months (October–March), and is considered uncommon to rare in the country’s highland zones. Unlike resident woodpeckers, it does not excavate in search of larvae: it drills horizontal rows of small holes into the bark of living trees to feed on the flowing sap, creating characteristic patterns that also serve hummingbirds and insects. Its presence in Costa Rica marks the southern limit of its wintering range.

The Smallest

The **Olivaceous Piculet (Picumnus olivaceus), at barely 10 cm and between 10 and 15 grams, is the smallest woodpecker that can be observed in Costa Rica — and one of the smallest in the world. It belongs to the subfamily Picumninae, which anatomically separates it from the rest of the woodpeckers: unlike its relatives, it does not use its tail as a brace while climbing, instead moving along thin branches, vines, and stems with an agility that more closely resembles a passerine than a woodpecker. Its plumage is subdued — olive-brown above, paler below, with a black crown spotted white in both sexes; the male adds orange spots on the forehead as the only distinguishing mark. It is popularly known as the telegrafista (telegrapher), for the rapid, rhythmic tapping on thin branches that evokes the clicking of a telegraph key. It frequents forest edges, open woodlands, scrub, shaded crops, and gardens, generally below the canopy. In Costa Rica it is a resident of the Caribbean slope*, uncommon in the drier areas south of Lake Nicaragua and west of the Río Frío region, according to Stiles and Skutch*.

Olivaceous Picullet. Photo by Fabio Araya

The Beak, the Drumming, and the Tongue: Impact-Proof Engineering

Let's dive deep into the world of the woodpeckers and their physiology.

20 Strikes Per Second, 12,000 Per Day

An adult woodpecker can strike wood at a speed of up to 20 times per second, equivalent to some 12,000 percussions per day during the active season. With each strike, its skull experiences deceleration forces of between 1,000 and 1,400 G — for context: an impact of 60 to 100 G would be enough to cause a concussion in a human being. The fact that a woodpecker does not end the day with accumulated brain damage is, in biomechanical terms, one of the most sophisticated designs evolution has ever produced. And it operates on several levels.

The Hyoid Bone: The Skull’s Safety Belt

In most vertebrates, the hyoid bone is a simple structure located beneath the jaw that anchors the tongue muscles. In woodpeckers, that bone was transformed into something completely different.

A woodpecker’s hyoid is a long, flexible, muscle-wrapped structure that originates at the nasal passages, bifurcates between the eyes, wraps completely around the back of the skull, and reunites at the base of the lower jaw. In simple terms, the woodpecker’s tongue is anchored to a bone that embraces the brain like a safety belt.

This design serves two critical functions. First, when the bird strikes wood, the impact forces travel upward through the beak and meet the hyoid bone at the nasal passages before reaching the skull. The vibrations are then redirected along the hyoid’s path, dissipating into the surrounding muscles rather than transmitting directly to the brain. Second, at the precise moment of impact, the muscles surrounding the hyoid contract, stabilizing the skull and reducing the brain’s movement within the cranial cavity — the same principle that makes a helmet work.

The Spongy Skull and the Asymmetric Beak

The hyoid does not work alone. A woodpecker’s skull has a layer of spongy or cancellous bone in the frontal region — absent in most birds — that acts as a crumple zone, dispersing shock waves before they reach the brain. The lower mandible is slightly longer than the upper, so that at impact, force is distributed first downward — toward the jaw and hyoid — rather than directly to the skull.

The Tongue: A Lance Up to One-Third of Body Length

Beyond its role as a shock absorber, the woodpecker’s tongue is an extraordinary hunting tool. Depending on the species, it can extend two to four times the length of the beak — in some species, up to one-third of the animal’s total body length — thanks precisely to the hyoid that stores it coiled around the skull.

The tongue’s tip varies according to each species’ diet: in those specializing in xylophagous insect larvae (wood-eaters), it bears small backward-facing barbs or spines that function as a harpoon, allowing larvae to be extracted from narrow galleries with surgical precision. In species that are more frugivorous or that eat ants, the tip is smoother or adhesive.

Drumming: The Language That Is Not Song

Woodpeckers are not notable singers — their vocalizations tend to be simple, harsh calls — but they are masterful percussionists. Drumming is their equivalent of song: a rapid, rhythmic series of strikes on a resonant surface, generally dead or hollow wood, that travels far beyond any vocalization. It is used to declare territory, attract a mate, and maintain the bond between members of an established pair.

Each species has a slightly different drumming pattern in speed, duration, and rhythm, distinctive enough for woodpeckers of the same species to recognize it. And they don’t only use trees: in peri-urban areas, it is not uncommon to hear woodpeckers drumming on tin roofing, metal gutters, or utility poles — surfaces that amplify sound in extraordinary ways.

Nesting: Architects of Primary Cavities

The most transcendent role woodpeckers play in the ecosystem is not what they eat, but what they build.

Woodpeckers are what ecologists call primary cavity excavators: they are the only birds capable of creating holes in live or dead wood. This ability makes them involuntary housing providers for dozens of other species that would otherwise have nowhere to nest.

Site selection is careful. Woodpeckers preferentially choose trees with wood partially decomposed by fungi — soft enough to excavate without excessive wear on the beak, yet firm enough to maintain the nest’s structure. This preference for trees at a certain stage of decomposition leads them frequently to standing dead trees, precisely the elements most often removed first in forestry management or farm clearing.

Excavating a cavity can take anywhere from a few days to several weeks, and the work is shared by both members of the pair. The finished hole has a circular or slightly oval entrance, a descending gallery, and an inner chamber where the eggs are laid — white, unmarked, as befits a species that does not need to camouflage them. Chicks hatch altricial (requiring constant parental care), blind, and featherless.

Once the woodpecker vacates the nest — generally at the end of the breeding season — the cavity does not stay empty for long. Parrots, parakeets, small owls, tree ducks, bats, squirrels, snakes, and a long list of other animals are secondary tenants that depend entirely on the availability of these pre-existing cavities. In Costa Rica, species such as the Crimson-fronted Parakeet (Psittacara finschi) and the Spectacled Owl (Pulsatrix perspicillata) are known to depend on woodpecker cavities for reproduction.

This makes woodpeckers what ecology calls ecosystem engineers or keystone species: organisms whose impact on the habitat is disproportionately large relative to their biomass. Removing woodpeckers from a forest not only eliminates those individuals; it collapses an entire network of dependencies extending to dozens of species.

Ecosystem Importance: Beyond the Nest

In addition to their role as builders, woodpeckers provide ecosystem services that are rarely mentioned.

• As controllers of xylophagous insects, they consume massive quantities of beetle larvae, termites, ants, and other invertebrates that live in wood. When their populations spike, some of these insects can cause significant mortality in weakened trees. Woodpeckers function as natural regulators of these populations, especially in mature forests where dead wood is abundant.
• As indicators of forest health, their presence — especially that of the largest species — is a reliable signal that the forest has sufficient continuity, maturity, and old trees to sustain their foraging and nesting needs. The disappearance of the Lineated Woodpecker from a landscape frequently serves as an early warning that forest quality has deteriorated beyond a certain threshold.
• As decomposition accelerators, woodpeckers perforate the bark and wood of dead trees, facilitating the entry of moisture and fungi that accelerate the nutrient return cycle to the soil. Their holes are not only nests: they are also entry points for the decomposition processes that sustain the forest’s fertility.

The Next Time You Hear the Drumming

The next time you hear that rhythmic, resonant tapping at a forest edge, a garden, or a riverbank, take a moment to think about what is happening: an animal between 20 and 38 centimeters long is delivering 20 strikes per second against wood, protecting its brain with a bone that wraps around the skull like a harness, announcing its territory with a percussive code that other members of its genus understand perfectly, and simultaneously excavating the home that next year will be occupied by a parrot, an owl, or a bat.

Costa Rica’s forest has many architects. But none works as hard, nor builds for as many, as the woodpecker.

All the woodpeckers featured in this article can be observed in their natural habitat in Costa Rica. If you’d like to experience them in person, the Birds & Breakfast team offers expert-guided birding tours — from the towering Pale-billed Woodpecker in the rainforest canopy to the tiny Olivaceous Piculet at forest edges.

References and Further Reading

Field Guides

• Garrigues, R. and Dean, R. (2014). The Birds of Costa Rica: A Field Guide (2nd ed.). Cornell University Press / Comstock Publishing Associates, Ithaca, NY. ISBN: 9780801479885.
• Garrigues, R., Dean, R. and Hille, D. C. (2024). The Birds of Costa Rica: A Field Guide (3rd ed.). Zona Tropical Publications / Cornell University Press. ISBN: 9781501790874.

Scientific Articles

• Jung, J.-Y. et al. (2016). Structural analysis of the tongue and hyoid apparatus in a woodpecker. Acta Biomaterialia, 37, 1–13. — Microstructural analysis of the hyoid bone using computed tomography; quantifies the differential energy absorption along the hyoid apparatus.
• Van Wassenbergh, S. et al. (2022). Woodpeckers minimize cranial absorption of shocks. Current Biology, 32(14). — Study challenging the classical narrative of the skull as shock absorber, arguing that the small brain and rigid skull are the primary protective factors.
• Sekercioglu, C. H. (2006). Increasing awareness of avian ecological function. Trends in Ecology & Evolution, 21(8), 464–471. — Review of the functional role of woodpeckers as cavity providers for other species in forest ecosystems.

Online Resources

• eBird Costa Rica (Cornell Lab of Ornithology): https://ebird.org/region/CR
• Avesdecostarica.com — Species accounts with descriptions, distribution, and behavior for each woodpecker recorded in the country.
• AskNature.org — Biomechanical strategies of the hyoid and the woodpecker’s spongy skull, with applications in materials engineering.