# Woodpecker — Facts, Threats & Conservation

*Picidae*

> A woodpecker is a tree-climbing bird of the family Picidae, with around 240 species worldwide. It uses a chisel-like bill to drum and excavate wood, aided by a shock-absorbing skull, gripping zygodactyl feet, a stiff propping tail and a long, barbed tongue for extracting insects.

**IUCN status:** Varies by species; most Least Concern  ·  **WARN range:** Europe, Asia, Africa, North America, South America

## Quick facts
| Fact | Value |
| --- | --- |
| Common name | Woodpecker |
| Family | Picidae |
| Order | Piciformes |
| Number of species | About 240 |
| Size range | ~7.5 cm (piculets) to 45-55 cm (great slaty woodpecker) |
| Diet | Mainly insects and larvae; also fruit, nuts, seeds and sap |
| Distribution | Most of the world except Australasia, Madagascar and polar regions |
| Key adaptations | Chisel bill, shock-absorbing skull, zygodactyl feet, stiff tail, long barbed tongue |
| Behaviour | Drumming and excavating wood; cavity-nesting |
| Conservation | Most Least Concern; some old-growth species threatened or likely extinct |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Aves
- **Order:** Piciformes
- **Family:** Picidae
- **Subfamilies:** Jynginae, Picumninae, Sasiinae, Picinae
- **Species:** ~240 in ~35 genera

## Conservation status
- **Status:** Varies by species. As a family, woodpeckers are not threatened: most of the roughly 240 species are assessed by the IUCN as Least Concern. A minority tied to mature or old-growth forest are Vulnerable, Endangered or Critically Endangered. The ivory-billed and imperial woodpeckers are Critically Endangered and possibly extinct, and the Bermuda flicker is extinct.
- **Population:** No single figure; varies enormously by species, from abundant and widespread to a handful of individuals or none for the rarest forms.
- **Trend:** Stable or increasing for many common species; declining for forest specialists affected by habitat loss.
- **Assessed:** Assessed per species by the IUCN Red List (ongoing).
- **CITES:** Most species are not listed on CITES; certain rare woodpeckers may receive national or regional legal protection.
- Loss of mature trees and standing deadwood is the chief threat to vulnerable woodpeckers. Retaining old trees and dead timber in managed forests is a key conservation measure.

## Key facts: Woodpecker
- Woodpeckers form the family Picidae, with about 240 species spread across most of the world's wooded regions.
- Their skull combines spongy bone and a wraparound hyoid apparatus that helps cushion repeated high-impact pecking.
- Zygodactyl feet (two toes forward, two back) and stiff tail feathers let them climb and brace on vertical trunks.
- A long, often barbed and sticky tongue probes deep into wood and bark to extract insects and larvae.
- Drumming on resonant surfaces is non-vocal communication used to defend territory and attract mates.
- Most species are Least Concern, but old-growth specialists such as the ivory-billed woodpecker are critically threatened or likely extinct.

## What makes a bird a woodpecker?
Woodpeckers belong to the family Picidae, which also includes the closely related piculets and wrynecks. The family contains roughly 240 species in about 35 genera, and is absent only from a few areas such as Australia, New Guinea, New Zealand, Madagascar and the extreme polar regions. What unites them is a suite of adaptations for life on tree trunks. Most have a strong, straight, chisel-tipped bill for excavating wood, and feet that are typically zygodactyl, with two toes pointing forward and two back to grip bark securely; a few species have only three toes. Stiffened, pointed tail feathers act as a prop, forming a stable tripod with the feet against a vertical surface. Inside the skull, an extraordinarily long hyoid apparatus supports a tongue that can extend far beyond the bill tip, often barbed and coated in sticky saliva. Sizes range widely, from tiny piculets around 7.5 cm long to the great slaty woodpecker, which can reach 45-55 cm. Many species show bold black-and-white patterning with patches of red or yellow.

## How do woodpeckers survive constant head-banging?
Repeatedly striking wood at speed would concuss most animals, so woodpeckers rely on several structural features. The skull contains spongy, plate-like bone, concentrated at the forehead and the back of the head, which helps distribute and absorb impact forces. The hyoid bone, which anchors the tongue, loops up and around the back of the skull, and is thought to act partly as a restraint and cushion for the braincase. The brain itself is small and packed tightly within the skull, and the bird tends to strike in near-straight lines to limit twisting forces. Strong neck muscles drive and control each blow. Researchers continue to study exactly how these features combine, and recent work suggests the head behaves more like a stiff hammer than a shock absorber, with the small brain tolerating the brief decelerations involved. Specialised nasal feathers and a protective membrane that can cover the eye during impact help keep out flying debris. Together these adaptations let a woodpecker hammer many times each second without obvious harm.

## Why do woodpeckers matter for forests?
Woodpeckers are widely described as ecosystem engineers. By excavating nest and roost cavities in dead and living wood, they create holes that many other species cannot make for themselves. Once a woodpecker moves on, its old cavities are reused by owls, other birds, bats, small mammals and insects, so a single pair can support a wider web of woodland life. Their constant foraging also helps regulate populations of wood-boring beetles and other insects, including some that damage trees. Because many woodpeckers depend on mature trees, standing deadwood (snags) and continuous forest, they are sensitive indicators of woodland health: where large old trees and decaying timber are removed, woodpeckers decline. This is why old-growth specialists are among the most threatened members of the family. Conserving the messy, deadwood-rich forests that woodpeckers need therefore benefits countless other species, from fungi and insects to the birds and mammals that shelter in abandoned woodpecker holes.

## What WARN does
World Animal Rescue Network does not run field projects specifically for woodpeckers, which live mainly outside the five countries where WARN's partners work. This guide is part of WARN's free educational programme, helping people understand and value wildlife. The threats that endanger rarer woodpeckers, above all the loss of mature forest and deadwood, are the same pressures of habitat destruction that harm many of the animals WARN does directly protect.

If learning about these forest carpenters brightened your day, a small gift helps keep WARN's free wildlife education and its hands-on animal rescue work going.

## Frequently asked questions: Woodpecker
### How fast and how often do woodpeckers peck?
Woodpeckers can deliver rapid bursts of strikes, with drumming sequences reaching on the order of 10-20 hits per second in many species. A bird may drum many times a day, and an individual can make thousands of pecks daily while foraging and excavating. Each species has its own drumming pattern, varying in speed, length and number of beats, which helps individuals recognise one another.

### Why do woodpeckers peck wood at all?
Woodpeckers peck for three main reasons: to find food, to excavate nest and roost holes, and to communicate. Foraging birds chisel into bark and wood to reach insects and larvae, then extract them with a long, barbed, sticky tongue. Excavation creates cavities for breeding and shelter. Drumming, the fast rhythmic tapping on resonant surfaces, is non-vocal signalling used to claim territory and attract a mate rather than to find food.

### Do woodpeckers get headaches or brain damage?
Woodpeckers are remarkably well protected against the forces of pecking. Spongy bone in the skull, a small tightly packed brain, strong neck muscles and a hyoid bone that wraps around the braincase all help manage impact. They typically strike in straight lines to reduce twisting forces. Current research suggests the head acts more like a stiff hammer than a cushion, and the small brain tolerates the brief decelerations without the damage such blows would cause in larger animals.

### Where do woodpeckers live?
Woodpeckers occur on most continents and across a wide range of wooded habitats, from rainforest and temperate woodland to deserts and grasslands with scattered trees. They are absent from Australia, New Guinea, New Zealand, Madagascar and the extreme polar regions. Most species depend on trees for feeding and nesting, though a few, such as ground-foraging species, spend much of their time away from trunks, feeding on ants and other ground insects.

### What do woodpeckers eat?
Most woodpeckers are insectivorous, specialising in wood-boring beetle larvae, ants and other invertebrates that they extract from bark and timber using their long, barbed tongues. Many also eat fruit, nuts and seeds, and some take tree sap. Sapsuckers, for example, drill neat rows of small wells to feed on sap and the insects it attracts. This varied diet helps woodpeckers regulate insect numbers and makes them important members of woodland food webs.

### Are woodpeckers endangered?
As a family, no: most of the roughly 240 woodpecker species are common and classified as Least Concern by the IUCN. However, a number of species that depend on old-growth forest are threatened, and the situation varies greatly from one species to another. The ivory-billed woodpecker and imperial woodpecker are critically endangered and may already be extinct, and the Bermuda flicker died out historically. Habitat loss, especially the removal of mature trees and deadwood, is the main threat to vulnerable species.

## Sources
- [Woodpecker - Wikipedia](https://en.wikipedia.org/wiki/Woodpecker)
- [Woodpecker - Encyclopaedia Britannica](https://www.britannica.com/animal/woodpecker)
- [IUCN Red List](https://www.iucnredlist.org)
- [Piciformes / Woodpeckers - All About Birds (Cornell Lab)](https://www.allaboutbirds.org/guide/browse/taxonomy/Picidae)
- [Ivory-billed woodpecker - Wikipedia](https://en.wikipedia.org/wiki/Ivory-billed_woodpecker)
- [Family Picidae - Wikipedia](https://en.wikipedia.org/wiki/Picidae)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/woodpecker