Family New World Blackbirds (Icteridae)

Least Concern

Greyish Baywing (Agelaioides badius)


French: Carouge à ailes baies German: Graustärling Spanish: Tordo músico
Other common names: Bay-winged Cowbird, Baywing Blackbird

Agelaius badius


, 1819,



Sometimes treated as conspecific with A. fringillarius, but the two differ in plumage coloration, vocalizations and some details of social behaviour. Behaviour suggests close relationship with monotypic genera Gnorimopsar and Oreopsar, and latter is well supported by molecular data#R. Races probably intergrade in Bolivia. Two subspecies recognized.

Subspecies and Distribution
  • A. b. badius (Vieillot, 1819) – E Bolivia (Beni) and S Brazil (S from S Mato Grosso and Paraná, rarely São Paulo) S to S Argentina (N Chubut) and Uruguay.
  • A. b. bolivianus (Hellmayr, 1917) – C & S Bolivia (La Paz to Chuquisaca).
  • Descriptive notes

    Male average 18·6 cm, 46·6 g; female average 18·4 cm, 43·7 g. Nominate race is brownish-grey overall, with blackish lores and narrow mask around... read more


    Song, by both sexes, slow, musical and continuous, a mix of trills, whistles, slurs, warbles and... read more


    Open woodland, savanna and scrub, from mesic to xeric. Prefers edges or clearings, and rare within... read more

    Food and feeding

    Seeds, insects (particularly Orthoptera and Lepidoptera) and other invertebrates, including spiders (Araneae) and amphipods; also some... read more


    Season Oct–Mar in Argentina; usually single-brooded. Nests solitarily; usually territorial. Co-operative breeder, with up to four... read more


    Apparently resident. Accidental in C Chile.

    Status and conservation

    Not globally threatened (Least Concern). Common and widespread; locally abundant. Quite adapted for living in modified environments. Has colonized N Patagonia (in S Argentina... read more

    Recommended citation

    Fraga, R. & Garcia, E.F.J. (2019). Greyish Baywing (Agelaioides badius). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 7 December 2019).