En bref

• Scientific Name: Chamaeza ruficauda
• Spanish Name: Tovaca colirroja
• Family: Formicariidae
• Known Nicknames: Rufous-tailed Ant-thrush
• Average Length: 19–20 cm / 7.5–8.0 in
• Average Weight: 60–95 g / 2.1–3.4 oz
• Envergure : N/A
• Key Feature: Bright rufous tail, heavily scalloped black-and-white underparts, and an upright, short-tailed posture
• Primary Diet: Insectivore (primarily forest floor invertebrates, spiders, and insects)
• Range: Atlantic Forest region of southeastern Brazil, eastern Paraguay, and northeastern Argentina
• Habitat: Floor and understory of humid subtropical and tropical montane forests
• Structure sociale : Solitaires ou en couples
• Nesting/Breeding: Natural tree cavities, hollow stumps, or crevices close to the ground
• Statut de conservation : Préoccupation mineure (LC)
• Évolution démographique : En baisse

The Rufous-tailed Antthrush (*Chamaeza ruficauda*) is a secretive, ground-dwelling gem of the South American Atlantic Forest, renowned for its elusive nature and striking, plump silhouette. This rail-like bird features rich olive-brown upperparts contrasted by heavily streaked, black-and-white underparts, but its most defining physical trait is the vibrant, rufous-red tail and rump that give the species its name. Highly terrestrial, it spends its life strutting across the dark forest floor with a comical, chicken-like gait, constantly pumping its short tail as it searches for insects. Though notoriously difficult to spot in the dense undergrowth, this captivating bird makes its presence known through a remarkable, accelerating song of rising whistles, making it both a haunting voice of the jungle and a highly prized sighting for birdwatchers.

Faits amusants

Despite spending almost its entire life on the dark forest floor, this avian eccentric behaves more like a miniature, hyperactive chicken than a typical bird, preferring to sprint away on its long, sturdy legs rather than fly when startled. As it walks, it performs a comical, non-stop "tail-pump," rhythmically bobbing its rusty tail up and down. While it is notoriously difficult to spot, it makes its presence known with an incredibly loud, mechanical song—an accelerating, bubbling trill that sounds like a winding-up toy and can last for nearly a minute. Ironically, despite this strictly ground-dwelling lifestyle, it defies expectations when it comes to parenting by nesting high up in natural tree cavities, proving it has a surprising appreciation for heights.

Habitats et répartition

This species is endemic to the Atlantic Forest of southeastern South America, with a geographical range restricted primarily to southeastern and southern Brazil, extending from the states of Minas Gerais and Espírito Santo south to Rio Grande do Sul. It also occurs marginally in adjacent northeastern Argentina, specifically within the province of Misiones. It is a terrestrial bird that primarily inhabits the floor of humid montane forests and mature secondary forests. It shows a strong preference for damp, shaded areas with dense undergrowth and bamboo thickets, typically dwelling at elevations between 900 and 2,200 meters, though it can be found closer to sea level in the southern parts of its range.

Comportements & Reproduction

This highly terrestrial species is notoriously secretive and solitary, though it is occasionally observed in pairs walking deliberately across the dark forest floor. It spends its day foraging in the leaf litter, tossing debris aside with its bill to uncover insects and other invertebrates, and prefers to run rapidly into dense undergrowth rather than fly when disturbed. It is strongly territorial, using a loud, accelerating song delivered from low perches to advertise its presence and maintain boundaries. During the breeding season, it forms monogamous pairs and utilizes a cavity-nesting strategy, selecting natural hollows in tree trunks or rotting stumps close to the ground. The nest chamber is lined with soft plant fibers where a clutch of usually two eggs is laid. Both parents participate in incubating the eggs and feeding the nestlings, maintaining a highly stealthy approach when entering and exiting the nest site to avoid attracting predators.

Alimentation

The Rufous-tailed Antthrush (*Chamaeza ruficauda*) is a highly terrestrial insectivore that feeds primarily on a diverse array of ground-dwelling invertebrates found within the dense leaf litter of the forest floor. Its diet consists largely of beetles, ants, spiders, grasshoppers, and millipedes, which it uncovers by walking deliberately and tossing aside leaves and soil debris with its bill. An interesting aspect of its diet is that, despite its common name, ants do not make up the entirety of its food source; furthermore, unlike many of its relatives, the Rufous-tailed Antthrush is not an obligate follower of army ant swarms, though it will opportunistically attend these swarms to snatch up other insects fleeing from the ants. Because it rarely takes flight to capture prey, this bird relies almost exclusively on its specialized ground-foraging techniques to exploit the rich biodiversity of the Atlantic Forest's leaf-litter community.

Couleurs

The Rufous-tailed Antthrush features rich olive-brown upperparts that contrast with a prominent rufous rump and tail, and whitish underparts heavily marked with bold blackish streaks. Its face is characterized by a distinct white post-ocular stripe and a pale throat. This highly cryptic, streaked coloration provides superb camouflage, allowing the bird to blend seamlessly into the shadows and leaf litter of the forest floor.

Distribution Map

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

Détails de l'attraction

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