<trp-post-container data-trp-post-id='360494'>Greenish Schiffornis

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En bref

  • Scientific Name: Schiffornis virescens
  • Spanish Name: Schiffornis verdoso
  • Family: Tityridae
  • Known Nicknames: Greenish Mourner, Greenish Schiffornis
  • Average Length: 14–15 cm / 5.5–5.9 in
  • Average Weight: 21–28 g / 0.74–0.99 oz
  • Envergure : N/A
  • Key Feature: Olive-green plumage with a slight yellowish tinge on the belly and a relatively long, slender bill
  • Primary Diet: Insectivore and Frugivore
  • Range: Southeastern Brazil, eastern Paraguay, and northeastern Argentina (Misiones)
  • Habitat: Understory of humid lowland and montane Atlantic Forest, often near streams
  • Structure sociale : Solitaires ou en couples
  • Nesting/Breeding: Cup-shaped nest built in a tree fork or among vines
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The Greenish Schiffornis (*Schiffornis virescens*) is a secretive, thrush-like bird of the South American Atlantic Forest, often more heard than seen due to its haunting, descending whistle. Its general appearance is understated yet elegant: a uniform, olive-green body with a slightly paler belly, a slender bill, and a short tail, allowing it to blend seamlessly into the dim understory. A unique characteristic is its taxonomic ambiguity, as it belongs to the cryptic family Tityridae, sharing traits with both manakins and cotingas. Its most special feature is its solitary, skulking behavior—rather than joining mixed-species flocks, it methodically forages for insects and fruit in the dense leaf litter, moving with a deliberate, almost mouse-like gait that makes it a challenging prize for birdwatchers.

Faits amusants

Despite its unassuming name, the Greenish Schiffornis is a master of ventriloquism; its song is so ventriloquial that it often sounds like it’s coming from behind you when it’s actually in front, confusing both predators and birdwatchers. It has a peculiar habit of “shivering” its wings rapidly while perched, a behavior thought to be a visual signal in the dim understory. Unlike many songbirds, it doesn’t build a cup nest—instead, it lays its eggs directly into a shallow depression in a tree cavity, often reusing old woodpecker holes. Its diet is almost exclusively large, fleshy fruits, which it swallows whole, and it plays a crucial role in seed dispersal for many rainforest trees, acting like a tiny, feathered gardener.

Habitats et répartition

The Greenish Schiffornis is found in the Atlantic Forest biome of southeastern Brazil, eastern Paraguay, and far northeastern Argentina (Misiones). It inhabits the understory and midstory of humid lowland and montane forests, including primary forests and mature secondary growth, typically staying in dense, shaded areas with abundant leaf litter and tangled vegetation. Its distribution is largely continuous along the Brazilian coast from southern Bahia to Rio Grande do Sul, extending inland into the interior forests of Minas Gerais and São Paulo.

Comportements & Reproduction

The Greenish Schiffornis is generally solitary or found in pairs, with a social structure that is not highly gregarious. Its mating system is presumed to be monogamous, with pairs defending a territory during the breeding season. Males are known for their loud, whistled songs, which serve to attract females and establish territory boundaries. A unique reproductive strategy involves the construction of a bulky, cup-shaped nest made of leaves and moss, often placed in a tree fork or on a horizontal branch. The female typically lays two eggs, and both parents share incubation and chick-rearing duties, a common behavior among many suboscine passerines. No elaborate courtship displays have been documented beyond vocalizations.

Alimentation

The Greenish Schiffornis is primarily insectivorous, with a diet composed almost entirely of small arthropods gleaned from the forest understory. It forages actively, hopping through dense tangles and vine thickets to pick prey such as beetles, caterpillars, ants, spiders, and other invertebrates from leaves and bark, rarely sallying into the air. An interesting facet of its feeding behavior is that it often follows army ant swarms, not to consume the ants themselves but to capture the many insects and spiders flushed from the leaf litter by the advancing column. This opportunistic strategy provides a rich, concentrated food source, particularly during the breeding season when energy demands are high.

Couleurs

The Greenish Schiffornis is predominantly olive-green above, with a slightly paler, yellowish-tinged underside. Its wings and tail are a duller brownish-olive, lacking bold markings or streaks. This uniform, muted coloration provides excellent camouflage in the dim understory of its forest habitat, blending with leaves and shadows. A faint, pale eye-ring is its most notable but subtle feature.

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