White-winged Becard

En bref

  • Scientific Name: Pachyramphus polychopterus
  • Spanish Name: Cabezón aliblanco
  • Family: Tityridae
  • Known Nicknames: White-winged Becard, Black-capped Becard
  • Average Length: 14–15 cm / 5.5–5.9 in
  • Average Weight: 15–22 g / 0.53–0.78 oz
  • Envergure : N/A
  • Key Feature: White wing bars and contrasting black cap in males
  • Primary Diet: Insectivore/Frugivore
  • Range: Central and South America, from southern Mexico to northern Argentina
  • Habitat: Forest edges, secondary growth, and open woodlands
  • Structure sociale : Solitaires ou en couples
  • Nesting/Breeding: Large, globular nest of plant fibers suspended from a branch
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The White-winged Becard (*Pachyramphus polychopterus*) is a striking, medium-sized passerine bird found in the forests of Central and South America, known for its dramatic sexual dimorphism. The male is a sleek, black-and-white bird with a glossy black cap, back, and throat contrasting sharply with pure white underparts and bold white wing patches, while the female is a warmer, cinnamon-brown with a rufous cap and paler underparts, giving the species a dual visual identity. A unique characteristic is the male’s slightly hooked bill and its habit of perching conspicuously on exposed branches, often singing a repeated, whistled song. Special features include its complex, globular nest—a hanging pouch of plant fibers and spiderwebs with a side entrance—and its role as a versatile insectivore and frugivore, occasionally joining mixed-species flocks. This becard’s sharp color contrast and architectural nesting make it a fascinating subject for birdwatchers in its range.

Faits amusants

Despite its name, the male White-winged Becard isn't always white-winged—young males and many adults sport a striking black-and-white pattern that mimics a much larger, aggressive bird to deter predators. It’s a master of architectural deception, building a massive, globular nest with a side entrance that often incorporates spiderwebs and caterpillar silk, sometimes even attaching a fake, empty nest above it to confuse potential nest-raiders. One of its most peculiar habits is "anting," where it deliberately rubs ants or other insects onto its feathers, likely to use the formic acid as a natural insecticide or fungicide.

Habitats et répartition

The White-winged Becard occupies a broad range of lowland and foothill habitats, including humid and semi-deciduous forests, forest edges, gallery forests, secondary growth, and plantations. It is particularly associated with open woodlands and areas with scattered trees, often near watercourses, and can be found from sea level up to around 1,500 meters in elevation. Its geographical range extends from eastern Panama through northern and central South America, including Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil, and northern Paraguay, with isolated populations also present in Trinidad and Tobago.

Comportements & Reproduction

The White-winged Becard is generally solitary or found in pairs, with a social structure centered on a monogamous bond during the breeding season. Males perform courtship displays that include wing-fluttering and vocal duets with the female. A unique reproductive strategy is the construction of a large, hanging, domed nest woven from plant fibers and spiderwebs, often placed at the tip of a branch over water to deter predators. The female typically lays 2-3 eggs, and both parents share incubation and feeding duties, with the male actively guarding the nest site.

Alimentation

The White-winged Becard is primarily an insectivore, with a diet heavily dominated by large arthropods such as beetles, caterpillars, grasshoppers, and spiders, which it actively gleans from foliage and branches in the forest canopy. Interestingly, it also consumes a significant amount of fruit, particularly small berries and drupes, making it an opportunistic frugivore that helps disperse seeds. A notable dietary behavior is its tendency to join mixed-species foraging flocks, where it benefits from the commotion of other birds to flush out hidden insects. Additionally, during the breeding season, males have been observed presenting captured prey—often a large caterpillar or beetle—to females as part of courtship feeding, a practice that strengthens pair bonds.

Couleurs

The male White-winged Becard is mostly glossy black above with a pale gray rump, white wing patches, and white underparts with a variable pale gray wash on the breast. Females are olive-brown above with a gray cap, yellowish underparts, and bold white wing bars. Both sexes have a stout, slightly hooked bill. Their coloration provides camouflage in dappled forest light, with the white wing markings being a distinctive field mark.