<trp-post-container data-trp-post-id='359686'>Atlantic Plain-Xenops
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En bref
- Scientific Name: Xenops minutus
- Spanish Name: Xenops llanero
- Family: Furnariidae
- Known Nicknames: Plain Xenops, Plain-winged Xenops
- Longueur moyenne : 11–12 cm / 4,3–4,7 pouces
- Average Weight: 10–13 g / 0.35–0.46 oz
- Envergure : N/A
- Key Feature: Short, wedge-shaped bill with slightly upturned lower mandible
- Régime alimentaire principal : Insectivore
- Range: Eastern Brazil (Atlantic Forest), eastern Paraguay, northeastern Argentina
- Habitat: Lowland and montane Atlantic Forest understory and mid-story
- Social Structure: Solitary or in mixed-species foraging flocks
- Nesting/Breeding: Tree cavities or old woodpecker holes
- Statut de conservation : Préoccupation mineure (LC)
- Évolution démographique : En baisse
The Atlantic Plain-Xenops (*Xenops minutus*) is a small, hyperactive songbird endemic to the lowland forests of eastern Brazil, distinguished by its unique, wedge-shaped bill that curves slightly upward—a specialized tool for prying loose bark and dead leaves to extract hidden insects. Its general appearance is subtly striking: a warm brown back, cinnamon underparts, a bold white supercilium (eyebrow stripe), and a long, stiff tail used for bracing against tree trunks like a woodcreeper. A special feature is its distinctive, high-pitched, dry trill that echoes through the understory, often given in a rapid series, making it easier to hear than to spot as it scurries along branches in mixed-species flocks.
Faits amusants
Despite its name, the Atlantic Plain-Xenops is not a true "plain" dweller; it inhabits humid lowland forests and is famously acrobatic, often hanging upside-down like a tiny woodpecker while gleaning insects from bark crevices. It possesses a uniquely stiff, wedge-shaped tail that it uses as a prop against tree trunks, allowing it to hitch upward with surprising speed. Perhaps its quirkiest trait is a bizarre, nasal “squeaky-toy” call, and it will sometimes follow army ant swarms to snatch fleeing arthropods, a behavior more common in antbirds than in its own family.
Habitats et répartition
The Atlantic Plain-Xenops (*Xenops minutus*) is found across a broad geographical range spanning from southern Mexico through Central America and into much of South America, including the Amazon Basin, the Guianas, and the Atlantic Forest of eastern Brazil. It primarily inhabits humid lowland forests, including terra firme and várzea forests, as well as forest edges and secondary growth. It is most common below 1,000 meters elevation, though it can occur up to around 1,500 meters in some regions. This bird is strongly associated with the understory and midstory of dense, mature tropical forests, where it forages along branches and trunks for insects and other arthropods.
Comportements & Reproduction
The Atlantic Plain-Xenops is generally solitary or found in pairs, often joining mixed-species foraging flocks but maintaining loose social bonds outside of breeding. Mating appears to be monogamous for the season, with courtship involving mutual chasing and soft vocalizations near potential nest sites. A unique reproductive strategy is its choice of nesting cavities: it typically excavates or appropriates holes in dead palm fronds or termite mounds, avoiding the more common tree trunks used by related species. The female lays two white eggs, and both parents share incubation and feeding duties, with the male often bringing larger prey items to the nest.
Alimentation
The Atlantic Plain-Xenops (Xenops minutus) is an insectivorous bird with a highly specialized diet, feeding almost exclusively on small arthropods such as beetles, caterpillars, ants, and spiders. It forages by hitching itself along tree trunks and branches, often upside-down, using its uniquely upturned, wedge-shaped bill to pry off loose bark or probe into decaying wood to extract hidden prey. A particularly interesting fact about its diet is that it primarily targets wood-boring insect larvae and pupae, which it detects through subtle movements or sounds beneath the bark, making it a crucial predator of tree pests in its forest habitat. Additionally, it occasionally supplements its insect intake with small spiders and rarely consumes tiny seeds or fruit, but such plant matter constitutes a negligible part of its overall nutritional intake.
Couleurs
The Atlantic Plain-Xenops (Xenops minutus) has a brownish-olive upper body with a distinct pale supercilium (eyebrow stripe) and a white throat. Its underparts are whitish to buff, heavily streaked with dark brown on the breast and flanks. The tail is rufous with black subterminal bands, and the short, wedge-shaped bill is slightly upturned. Its cryptic brown and streaked pattern provides excellent camouflage against tree bark in its forest understory habitat.
Distribution Map
Places linked to this species. A sighting is never guaranteed.
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Featured places
- Reserva Ecológica de Guapiaçu (REGUA)
- Reserva Particular do Patrimônio Natural Estação Veracel
- Legado das Águas – Reserva Votorantim
- Explorer les sentiers forestiers à la recherche des endémiques de la forêt atlantique
- Forest trails and bamboo specialists
- Intervales morning birding
Tours where this species is featured
