INVESTIGADORES
MERMOZ Myriam Emilia
artículos
Título:
FIRST RECORD OF PARASITISM OF SCARLET-HEADED BLACKBIRD (AMBLYRAMPHUS HOLOSERICEUS) BY THE SPECIALIZED SCREAMING COWBIRD (MOLOTHRUS RUFOAXILLARIS)
Autor/es:
MERMOZ, M. E.; DEPALMA, M. D.; CHARNELLI, E.M.; ZILLI, C.
Revista:
El Hornero
Editorial:
Asociación Ornitológica del Plata
Referencias:
Lugar: Buenos Aires; Año: 2021 vol. 36 p. 93 - 98
ISSN:
0073-3407
Resumen:
Screaming Cowbird (Molothrus rufoaxillaris) is highly specialized parasitizing only three species, making records of new hosts very informative. During 2017 we studied nesting success on roadsides in Argentine Pampas. Fifty-seven nests (46%) belonged to the known host Brown-and-yellow Marshbirds (Pseudoleistes virescens). Four nests belonged to Scarlet-headed Blackbird (Amblyramphus holosericeus); one contained a Screaming Cowbird nestling that fledged with two of the host. We discuss similarities and differences among the Scarlet-headed Blackbird and old hosts. More studies are needed to confirm the regular parasitism of Scarlet-headed Blackbird by Screaming Cowbird, and to better understand their high specificity in host selection.
