En bref

• Scientific Name: Myiornis fasciatus
• Spanish Name: Bailarín sureño
• Famille : Tyrannidae
• Known Nicknames: Southern Antpipit, Fasciated Antpipit
• Average Length: 9–10 cm / 3.5–4 in
• Average Weight: 8–12 g / 0.28–0.42 oz
• Envergure : N/A
• Key Feature: Small size with a short tail and a faintly barred or streaked breast
• Régime alimentaire principal : Insectivore
• Range: South America: eastern Brazil, eastern Paraguay, and northeastern Argentina
• Habitat: Understory of humid lowland forests and forest edges
• Structure sociale : Solitaires ou en couples
• Nesting/Breeding: Domed nest with side entrance, placed low in vegetation
• Statut de conservation : Préoccupation mineure (LC)
• Évolution démographique : Stable

The Southern Antpipit (*Myiornis fasciatus*) is a diminutive, cryptically colored passerine that ranks among the smallest flycatchers in the world, measuring barely 6.5 centimeters (2.6 inches) in length. Its general appearance is that of a tiny, plump ball of feathers, with a short, stubby tail and a disproportionately large head. Unique among its relatives, it is boldly patterned with a striking, pale yellow throat and belly set against an olive-brown back, while a distinctive black-and-white facial pattern—including a white supercilium and dark ear patch—gives it a perpetually alert, almost startled expression. Its most special feature is its remarkable vocalization: despite its minute size, the male produces a loud, metallic, insect-like "tsee-tsee-tsee" call that seems far too powerful for its body, often betraying its presence in the dense understory of humid lowland forests from the Amazon basin to southeastern Brazil.

Faits amusants

Despite its name, the Southern Antpipit is a tyrant flycatcher, not a true pipit or antbird, and it compensates for its tiny size—one of the smallest passerines in South America—with a disproportionately loud, high-pitched song that sounds like a squeaky toy. It performs a quirky “tail-pumping” behavior, rhythmically bobbing its tail up and down while foraging, which is unusual among its relatives and may help flush insects from leaf litter. Its legs are unusually long for a flycatcher, an adaptation for hopping through dense undergrowth rather than sallying from a perch like typical flycatchers.

Habitats et répartition

The Southern Antpipit inhabits humid lowland forests, primarily within the Amazon basin, where it is found in dense understory vegetation, often near watercourses like streams and rivers. It prefers terra firme forests and occasionally várzea floodplains, avoiding open areas and forest edges. Its geographical range spans from eastern Ecuador and Peru through northern Bolivia and into western Amazonian Brazil, with a disjunct population also recorded in southeastern Brazil’s Atlantic Forest. The species is generally restricted to elevations below 500 meters, though local occurrences up to 1,000 meters have been noted.

Comportements & Reproduction

The Southern Antpipit is a solitary and highly territorial bird, with males defending small, humid forest patches in the Amazon basin. Mating begins with the male performing a distinctive, repetitive song from a low perch to attract a female, often accompanied by a short, fluttering display flight. Pairs form only for the breeding season, and there is no complex social structure beyond this temporary bond. The female constructs a small, domed nest with a side entrance, typically placed in a mossy bank or among tree roots. She alone incubates the two eggs for roughly 14–16 days, while the male assists by bringing food to the nest. A unique reproductive strategy is the nest’s cryptic placement and the species’ habit of remaining motionless near the nest when disturbed, relying on camouflage to avoid predation rather than aggressive defense.

Alimentation

The Southern Antpipit (*Myiornis fasciatus*) is an insectivorous bird, with its diet consisting almost exclusively of small arthropods gleaned from the foliage and bark of the forest understory. It primarily consumes tiny insects such as flies, beetles, ants, and caterpillars, as well as spiders and other arachnids. An interesting facet of its feeding behavior is its method of foraging: it often joins mixed-species feeding flocks, moving actively through the mid-canopy and using short, rapid sallies to snatch prey from leaves and branches. Despite its very small size—one of the smallest passerines in South America—it does not consume nectar or fruit, relying entirely on high-protein invertebrate prey to sustain its energetic metabolism. Additionally, its diet may shift seasonally in response to insect abundance during the rainy season, when prey is more plentiful.

Couleurs

The Southern Antpipit (Myiornis fasciatus) is a tiny, olive-brown bird with a pale yellow belly and throat. Its most distinctive feature is a bold, blackish crescent-shaped breast band, which contrasts sharply with the white underparts below it. The face has a subtle whitish eyering and a faint pale supercilium. Its cryptic, streaked back and crown provide excellent camouflage among leaf litter on the forest floor.

Distribution Map

Places linked to this species. A sighting is never guaranteed.

Détails de l'attraction

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