The Black-capped Becard (*Pachyramphus marginatus*) is a striking, medium-sized passerine bird found in the humid lowland forests of the Amazon and Atlantic basins, renowned for its bold sexual dimorphism and unique vocalizations. Males are unmistakable with a jet-black crown and nape contrasting sharply with a pure white face and underparts, while their back and wings are a crisp slate-gray edged with white; females, in contrast, are more subdued with a warm rufous cap, olive-brown upperparts, and pale yellow underparts. A special feature of this species is its large, slightly hooked bill, adapted for plucking large insects and berries from foliage, and its habit of constructing a bulky, globular nest with a side entrance, often suspended from a branch tip over water. Their distinctive, nasal “chee-ah” call and slow, deliberate foraging style make them a memorable highlight for birdwatchers in the Neotropics.

Faits amusants

The black-capped becard is a master of architectural deception, as the male builds multiple dummy nests—often up to a dozen—around his territory to confuse predators, while the female alone selects and finishes the real one. Despite its small size, this bird is a fierce nest defender, known to mob and drive away much larger intruders, including toucans and hawks. It also exhibits reversed sexual dimorphism in behavior: the more brightly colored male is often the shyer, quieter partner, while the drabber female takes the lead in aggressive territorial disputes.

Habitats et répartition

The Black-capped Becard inhabits tropical and subtropical lowland forests, primarily in humid evergreen and semi-deciduous woodlands. It is also found in forest edges, clearings with tall trees, and secondary growth, often favoring the canopy and subcanopy layers. Its distribution spans from southeastern Brazil (south of the Amazon basin) through eastern Paraguay and into northeastern Argentina, specifically in the provinces of Misiones and Corrientes. It occurs at elevations generally below 1,000 meters, but locally up to 1,500 meters in some Andean foothills.

Comportements & Reproduction

The Black-capped Becard is a generally solitary or pair-living bird, with pairs forming monogamous bonds during the breeding season. Males and females cooperate in nest construction, building a large, elongated, hanging pouch nest woven from plant fibers, often suspended from a branch tip over water or a steep drop to deter predators. Both parents share incubation duties for the typical clutch of two to three eggs, and they jointly feed the nestlings. A unique reproductive strategy involves the male performing a display flight, fluttering his wings rapidly while calling to court the female, and the pair may reuse or renovate an old nest for subsequent broods within the same season.

Alimentation

The Black-capped Becard is primarily an insectivore, with its diet consisting largely of a variety of insects such as beetles, caterpillars, ants, and wasps, which it typically gleans from foliage or captures in short, sallying flights from a perch. An interesting aspect of its feeding behavior is its occasional consumption of small fruits and berries, particularly during the non-breeding season when insect prey may be less abundant, demonstrating a degree of dietary flexibility. Furthermore, this species is known to occasionally join mixed-species foraging flocks, allowing it to exploit a wider range of prey by following the movements of other insectivorous birds.

Couleurs

The male Black-capped Becard has a glossy black cap, white face and underparts, and a gray back with black wings marked by two white wing bars. The female is duller, with a brown cap, buffy throat, and pale yellow underparts, lacking the male’s stark contrast. Both sexes show a faint pale rump patch, and their muted, broken coloration provides camouflage against dappled forest light.