Strong-billed Woodcreeper

How to find it

A Costa Rica birder says this rare woodcreeper could turn up at any heavily forested foothill or middle elevation site. Scan every forest level, from the understory up to the subcanopy, not just the trunks at eye height. Listen at dawn and dusk for the loud KEW-WEE song. Check mixed feeding flocks and any army ant swarm, since swarms are a good place to watch for large, shy forest birds. Intact forest is the best bet, as it prefers primary forest interior and mature forest edges.

How to recognise it

Size is the first clue. Typical birds are about 28 to 31 cm long and weigh around 120 g, and males and females look alike. The bill is the second clue: massive and slightly downcurved.

The plumage is brownish and streaked. Spanish descriptions give:

- a blackish brown crown with buff streaks on the crown and upper back

- a chestnut back and wings

- a whitish buff throat

- fine buff streaks on the chest

- a belly barred black

- rufous tail and flight feathers

- olive legs

- a chestnut eye

- a bill the colour of olive horn

When sorting Costa Rican woodcreepers, focus on the head and bill. The rusty wings and tail are shared by nearly all species, so they help little.

What it sounds like

Recording: Rajan Rao, CC BY 4.0, source, read 4 Nov 2026.

Behaviour and diet

This woodcreeper is found alone or in pairs. It often forages low near the ground, then works up into trees, and it joins mixed feeding flocks. A Costa Rica birder notes that it feeds from the understory up to the subcanopy.

It sometimes follows army ant swarms, where it usually dominates the smaller birds that also attend them. At swarms in Costa Rica it can turn up with other woodcreepers and antbirds.

Where it lives

Across its whole range it lives in humid montane forest and lowland forest and their edges, from sea level to near 3500 m, and it is described as uncommon. Those figures are range-wide, not Costa Rican. Across Middle America the subspecies live in montane forest, mainly oak and pine-oak, and also in lowland rainforest and pine-dominated ridges.

In Costa Rica it is found in the mountains. The Costa Rican subspecies, costaricensis, occurs in the highlands of central Costa Rica and southwestern Panama (Chiriquí).

Similar birds

Its large size and massive, slightly downcurved bill make it almost unmistakable among Costa Rican woodcreepers. Spotted Woodcreeper is the common large woodcreeper of mid-elevation forests, but Strong-billed is bigger with a much heavier bill. Cocoa Woodcreeper has a strong, straight bill, buff throat and buff streaks, and is fairly common in humid lowland forest. Northern Barred Woodcreeper is large and black-billed too, but has no streaks and shows faint bars on the face and belly.

Names and lore in Costa Rica

Costa Ricans call this bird Trepador Gigante, which means giant woodcreeper, a name also used in Nicaragua. Other countries use trepatroncos picofuerte, trepatroncos gigante or trepador pico negro.

Status and conservation

The AOCR list marks it as a resident (R), and the IUCN lists it as Least Concern, with an estimated 50,000 to 499,999 mature individuals.

Photography tips

Scan every forest level, not just trunks at eye height, since it feeds from the understory up to the subcanopy. An army ant swarm is a good place to wait for it.