Description: It is a medium-sized climbing bird with a slender shape and cryptic appearance, well adapted for moving along trunks and branches. The plumage is olive-brown to chestnut, heavily streaked with white and buff, providing excellent camouflage. The head is elongated with a faint pale eyebrow, and its most distinctive feature is the long, thin, slightly curved bill, specialized for probing bark crevices. The tail is stiff and pointed, used as support while climbing.

Geographic distribution: It is widely distributed across central and southern South America, from eastern Bolivia and Paraguay through much of Argentina, Uruguay, and southern Brazil. It is characteristic of Chaco, Pampas, and Espinal regions, with a continuous presence throughout its range.

Habitat: It primarily inhabits open woodlands, native forests, savanna-like habitats, and rural wooded areas, including windbreaks and parks with mature trees. It shows a preference for dry or semi-arid environments, provided suitable tree structures are available.

Feeding: Its diet is strictly insectivorous, consisting of insects and other arthropods obtained by probing bark, cracks, and cavities. It feeds on beetles, ants, larvae, and spiders, using its specialized bill to extract hidden prey.

Behavior: It is an active bird, usually solitary or found in pairs, moving methodically along trunks, typically upwards. It frequently produces loud, repetitive calls that play an important role in territorial defense. It may occasionally join mixed-species foraging flocks.

Nesting: Nesting takes place in natural or excavated tree cavities, where a simple nest is built using plant material. The clutch usually consists of 2 to 3 eggs, incubated by both parents. Chick care is shared until fledging.

Conservation status: It is classified as Least Concern, with populations considered stable. However, loss of native forests and old trees may locally reduce nesting opportunities.

Author of this compilation: EcoRegistros – 22/12/2025