<trp-post-container data-trp-post-id='360455'>Chestnut-crowned Becard

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En bref

  • Scientific Name: Pachyramphus castaneus
  • Spanish Name: Cabezón castaño
  • Family: Tityridae
  • Known Nicknames: Chestnut-crowned Becard
  • Average Length: 14–15 cm / 5.5–5.9 in
  • Average Weight: 18–25 g / 0.63–0.88 oz
  • Envergure : N/A
  • Key Feature: Chestnut crown and nape contrasting with gray upperparts and pale underparts
  • Primary Diet: Primarily Insectivore (also eats some fruit)
  • Range: Southeastern Brazil, eastern Paraguay, and northeastern Argentina
  • Habitat: Atlantic Forest, humid lowland and montane forest edges, and secondary growth
  • Structure sociale : Solitaires ou en couples
  • Nesting/Breeding: Bulky cup-shaped nest placed in a tree fork
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The Chestnut-crowned Becard (*Pachyramphus castaneus*) is a striking passerine bird of Central and South America, renowned for its vibrant, sexually dimorphic plumage. Males are particularly eye-catching with a rich, deep chestnut crown and nape that contrasts sharply with their sooty-black mask, back, wings, and tail, while females are more subtly attired in warm browns and buffs with a faint, pale eyebrow. A unique characteristic of this species is its robust, slightly hooked bill, which it uses adeptly to snatch large insects and small fruits from the forest canopy. One of its most special features is the male’s elaborate, hanging, pouch-like nest—a woven marvel of plant fibers and spider webs that can reach over a foot in length, often suspended from a slender branch tip over water, making it a master architect of the neotropical treetops.

Faits amusants

Despite its name, the chestnut-crowned becard is a master of disguise, often hanging upside-down like a titmouse to glean insects from the undersides of leaves—a quirky feeding posture rare among its tyrant-flycatcher relatives. Males and females look so different (the male sports a rich chestnut crown and black mask, while the female is a drab olive) that early naturalists thought they were separate species. This bird also builds a bulky, globular nest with a side entrance, sometimes stealing nesting material from other birds or repurposing old nests of oropendolas. Perhaps its oddest trait: it will “freeze” motionless for minutes when startled, relying on camouflage rather than flight to avoid predators.

Habitats et répartition

The Chestnut-crowned Becard inhabits humid to semi-hhumid lowland forests, forest edges, and secondary growth, often favoring areas near water such as riverine forests and gallery woodlands. It is also found in plantations and tall second-growth scrub, typically staying in the canopy or subcanopy. Its geographical range extends from eastern Colombia and Venezuela through the Guianas, across much of Brazil (south to Mato Grosso and São Paulo), and into eastern Peru, northern Bolivia, and northern Argentina (Misiones).

Comportements & Reproduction

The Chestnut-crowned Becard is generally observed alone or in pairs, suggesting a monogamous social structure during the breeding season. Mating involves the male performing a display flight, often while calling, to attract a female. A unique reproductive strategy is the construction of a large, globular nest with a side entrance, woven from plant fibers and often lined with soft materials, which is typically suspended from a branch tip. The female takes primary responsibility for incubation, but both parents participate in feeding the nestlings. Clutch size is usually two to three eggs, and the species does not exhibit cooperative breeding or brood parasitism.

Alimentation

The Chestnut-crowned Becard is primarily an insectivore, with a diet consisting largely of a wide variety of arthropods such as beetles, caterpillars, ants, and spiders. It is an active forager, often observed sallying out from a perch to snatch prey mid-air or gleaning insects directly from leaves and branches in the forest canopy. Interestingly, while insects form the bulk of its nutrition, this becard also supplements its diet with small fruits and berries, particularly during the non-breeding season when insect availability may decline. Another notable dietary behavior is that it occasionally joins mixed-species foraging flocks, allowing it to exploit a broader range of food sources by following larger, more disruptive birds that flush out hidden insects.

Couleurs

The male Chestnut-crowned Becard has a rich chestnut crown and nape, contrasting with a black face mask, white throat, and gray upperparts. The female is duller, with a brownish crown, pale buff underparts, and faint streaking on the breast. Both sexes lack bold patterns, with subdued earth tones providing camouflage in forest canopy.

Distribution Map

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