The olive-crowned crescentchest is a species of bird in the family Melanopareiidae. It is found in Argentina, Bolivia, and Paraguay.
Region
Gran Chaco
Typical Environment
Occurs in dry to semi-arid scrub and thorn forest across the Gran Chaco of Bolivia, Paraguay, and northern Argentina. It favors dense, brushy areas with scattered cacti and bromeliads, edges of quebracho woodland, and degraded shrublands. Often found in patchy mosaics of scrub and pasture, staying close to ground cover. Uses thickets and low tangles for both foraging and nesting.
Altitude Range
200–1500 m
Climate Zone
Subtropical
Ease of Keeping
Beginner friendly: 1/5
A shy ground- and low-shrub forager of the Gran Chaco, the olive-crowned crescentchest is noted for its bold black breast crescent edged in white. Pairs often keep in contact with sweet, whistled duets while moving through thorny scrub. It frequently cocks and fans its long tail when agitated, then dashes between cover in short, low flights.
Temperament
shy and skulking
Flight Pattern
short rapid wingbeats, low dashes between cover
Social Behavior
Usually seen in pairs or small family groups maintaining territories in dense scrub. Nests are placed low in shrubs or dense tangles; both sexes likely contribute to breeding duties. Territorial displays include tail-cocking and duet singing.
Migratory Pattern
Resident
Song Description
A series of clear, mellow whistles delivered in short phrases, often rising slightly. Pairs frequently duet with antiphonal timing, creating a rich, carrying chorus from within cover.
Plumage
Olive-toned crown and nape with warm brown upperparts and a long, graduated tail. Underparts buffy to rufous with a striking black crescent across the upper breast bordered by a narrow white arc. Bold pale supercilium contrasts with a darker mask; wings show rufous-brown tones.
Diet
Primarily feeds on insects and other small arthropods, including beetles, ants, spiders, and caterpillars. Gleans prey from leaf litter, low branches, and thorny shrubs. May occasionally take small seeds or berries, especially during the dry season when insects are scarce.
Preferred Environment
Forages close to the ground within dense scrub, cactus stands, and the edges of thorn forest. Prefers areas with abundant leaf litter and tangled understory for concealment.
