Chrysomus ruficapillus
The Chestnut-capped Blackbird, `Chrysomus ruficapillus`, is a strikingly beautiful South American passerine belonging to the Icteridae family, which encompasses blackbirds, orioles, and meadowlarks. Males are unmistakable, sporting a glossy, iridescent black plumage contrasted sharply with a rich, rufous-chestnut cap that extends from the forehead to the nape, a field mark unique to the species. Females, in stark contrast, exhibit pronounced sexual dimorphism, appearing duller with olive-brow...
Primarily found in freshwater wetlands, marshes, extensive reed beds, and wet grasslands, often exploiting flooded agricultural areas like rice fields, typically at low to moderate elevations.
Primarily granivorous, consuming a wide variety of seeds from grasses and aquatic plants, supplemented significantly by insects and other small aquatic invertebrates, which they glean from vegetation or probe from mud and shallow water.
Chestnut-capped Blackbirds are highly gregarious, often forming massive, noisy flocks of hundreds or even thousands outside the breeding season, frequently mixing with other icterids and starlings. During the breeding period, males become territorial, defending small nesting areas within marshy e...
The Chestnut-capped Blackbird boasts a wide and stable distribution across southeastern South America. Its primary breeding range extends from central and southern Brazil, encompassing Uruguay and Paraguay, and reaching into central and northern Argentina. Isolated populations are also observed i...
Least Concern
- The Chestnut-capped Blackbird was formerly classified under the genus `Agelaius`, alongside North American red-winged and rusty blackbirds, until genetic analyses placed it more accurately within `Chrysomus`. - Male Chestnut-capped Blackbirds perform impressive aerial display flights, soaring h...