<trp-post-container data-trp-post-id='360497'>Sao Paulo Bristle-Tyrant
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En bref
- Scientific Name: Phylloscartes paulistus
- Spanish Name: Piojito de São Paulo
- Famille : Tyrannidae
- Known Nicknames: São Paulo Tyrannulet
- Longueur moyenne : 11–12 cm / 4,3–4,7 pouces
- Average Weight: 7–9 g / 0.25–0.32 oz
- Envergure : N/A
- Key Feature: Long, bristly rictal bristles around the bill
- Régime alimentaire principal : Insectivore
- Range: Southeastern Brazil (São Paulo, Paraná, Santa Catarina) and adjacent Argentina (Misiones)
- Habitat: Humid montane Atlantic Forest, especially bamboo thickets
- Social Structure: Solitary or in pairs, sometimes joining mixed-species flocks
- Nesting/Breeding: Small cup nest in a tree fork
- Statut de conservation : Quasi menacé (NT)
- Évolution démographique : En baisse
The **Sao Paulo Bristle-Tyrant** (*Phylloscartes paulistus*) is a small, elusive passerine bird endemic to the Atlantic Forest of southeastern Brazil, named for the state of São Paulo where it was first discovered. Slightly larger than a wren, it boasts a striking olive-green back, a pale yellow belly, and a distinctive white or yellowish eye-ring that gives it a perpetually alert expression. Its most unique characteristic is the bristle-like, elongated feathers at the base of its bill—a specialized adaptation for catching insects mid-air or gleaning them from foliage with swift, acrobatic sallies. Despite its subtle beauty, this bird is critically endangered due to severe habitat loss, making its specialized diet and reliance on pristine forest understory a conservation priority.
Faits amusants
The Sao Paulo Bristle-Tyrant has a famously irritable "eyebrow"—a bristly, white supercilium that it fluffs up aggressively when agitated, making it look perpetually annoyed. It is a master of the "sally-glean" hunting technique, launching from a perch to snatch insects mid-air or off leaves with an audible snap of its bill. Despite its tiny size, it produces a surprisingly loud, buzzy call that sounds like a zipper being yanked, and it often joins mixed-species flocks but remains a stubborn loner, refusing to follow the group’s direction. Its nest is a rare find: a delicate, cup-shaped structure woven entirely from spider silk and moss, suspended from a thin branch like a hanging basket.
Habitats et répartition
This tyrant is endemic to the Atlantic Forest of southeastern Brazil, with its distribution centered on the states of São Paulo, Paraná, and Santa Catarina, and extending marginally into Rio de Janeiro and Minas Gerais. It inhabits the interior and edges of humid, montane and submontane primary forests, typically between 500 and 1,200 meters in elevation. The species shows a strong preference for dense, mature forest with a closed canopy and abundant understory, particularly along steep slopes and near streams, and is rarely found in degraded or secondary growth. Its range is highly fragmented due to historical deforestation, and it is considered a habitat specialist.
Comportements & Reproduction
The Sao Paulo Bristle-Tyrant is typically observed alone or in pairs, suggesting a monogamous social structure during the breeding season. Its mating habits are poorly documented, but like many tyrant flycatchers, it likely engages in aerial displays and vocalizations to establish territories and attract a mate. The species builds a cup-shaped nest in a tree fork, where the female lays a small clutch of eggs, typically two. Both parents are believed to participate in incubating the eggs and feeding the chicks, a common strategy among insectivorous passerines. No unique reproductive strategies have been recorded, though its reliance on specific Atlantic Forest habitats may influence breeding timing relative to insect abundance.
Alimentation
The Sao Paulo Bristle-Tyrant is an insectivorous bird, with its diet comprised almost entirely of small arthropods. It forages actively in the mid to upper canopy of humid Atlantic Forest, employing a technique called sally-gleaning, where it makes short, quick flights from a perch to snatch prey from the undersides of leaves or from the air. A particularly interesting aspect of its feeding behavior is its specialization on gleaning small, soft-bodied insects like flies, caterpillars, and small beetles, rarely descending to lower strata or consuming fruit. It often joins mixed-species foraging flocks, taking advantage of the disturbance caused by other birds to flush hidden insects, a strategy that allows it to access prey it might otherwise miss while staying high in the dense foliage.
Couleurs
The São Paulo Bristle-Tyrant is predominantly olive-green above with a yellowish-green rump and brighter yellow underparts. It has a distinctive pale yellow supercilium (eyebrow stripe) and a dark olive crown, with faint whitish wingbars on dusky wings. Its most unique adaptation is the subtle, streaky pattern on its throat and breast, which provides disruptive camouflage against the dappled light of its Atlantic Forest understory habitat.
Distribution Map
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